History of Major League Baseball

Introduction

Major League Baseball (MLB) is the principal professional baseball league in the United States and Canada and one of the oldest professional sports leagues in continuous operation in the world. The league has been contested annually since 1903, when the first World Series was played between the National League pennant winner Pittsburgh Pirates and the American League pennant winner Boston Americans. The league's current 30 franchises are distributed across the United States (29 franchises) and Canada (the Toronto Blue Jays), with players from approximately 20 nations represented on team rosters.

Baseball itself developed during the mid-nineteenth century from various stick-and-ball games that had been played informally for centuries. The 1845 Knickerbocker rules, drafted by Alexander Cartwright for the New York Knickerbocker Base Ball Club, established many of the basic features of modern baseball including the diamond-shaped infield, the nine-inning game format, the three-strikes rule, the foul lines, and various other features. The Civil War of 1861-1865 substantially spread baseball through the various Union Army units, with returning soldiers establishing baseball clubs across the United States. The National League, founded in 1876, has been continuously operating ever since, making it one of the oldest professional sports leagues in the world.

This article surveys the full history of baseball from the 1845 Knickerbocker rules through the founding of the National League in 1876, the American Association of the 1880s, the 1901 founding of the American League and the modern two-league era, the 1903 first World Series, the 1919 Black Sox scandal, the Babe Ruth era and the New York Yankees dynasties of the 1920s through 1960s, the breaking of the color barrier by Jackie Robinson in 1947, the Brooklyn Dodgers' historic relocation to Los Angeles in 1958, the Steroid Era of the 1990s and 2000s, the 2004 Boston Red Sox championship that broke the 86-year Curse of the Bambino, the 2016 Chicago Cubs championship that ended the 108-year Curse of the Billy Goat, the modern era of Mike Trout, Aaron Judge, and Shohei Ohtani, the parallel Negro League tradition that existed during the period of racial segregation, the broader economic transformation of professional baseball through the modern era, and the future of one of the oldest continuing major professional sports leagues in the world.

Origins of Baseball (1840s-1875)

Baseball developed from various stick-and-ball games played in England, Ireland, and various other countries throughout the eighteenth and nineteenth centuries. The various early American versions of baseball had been played informally throughout the United States since the early nineteenth century, with various local variations developing independently. The most influential single moment in the development of organized baseball was the 1845 codification of the Knickerbocker rules by Alexander Cartwright for the New York Knickerbocker Base Ball Club.

Alexander Cartwright, a New York banker and fireman, codified the basic rules of baseball as they would be played by the Knickerbocker Club. The 1845 rules established many of the basic features of modern baseball: the diamond-shaped infield with bases set at right angles, the three-out structure of innings, the foul ball concept, the three-strikes rule, the requirement to tag base runners (rather than throwing the ball at them, which had been common in earlier variants), and various other features. The first match played under the Knickerbocker rules was held on June 19, 1846 at Elysian Fields in Hoboken, New Jersey, between the Knickerbockers and the New York Nine. The New York Nine won the match 23-1.

Baseball spread rapidly through the United States during the 1850s and 1860s. The Civil War of 1861-1865 substantially accelerated the spread of baseball, with Union Army units playing baseball in their various encampments and spreading the game when the soldiers returned to their home communities at the end of the war. By 1866, the National Association of Base Ball Players (NABBP) had grown to include more than 200 clubs across the United States.

The first openly professional baseball team was the Cincinnati Red Stockings of 1869, who toured the United States winning all of their matches that year. The 1871 National Association of Professional Base Ball Players (NA) was the first professional baseball league, with nine teams competing in the inaugural 1871 season. The NA operated for five seasons before being dissolved and replaced by the National League in 1876.

The National League and the American League

The National League of Professional Base Ball Clubs (NL) was founded on February 2, 1876 in New York City by representatives of eight professional baseball clubs. The new league was organized by William Hulbert, the owner of the Chicago White Stockings (now the Chicago Cubs), with the various subsequent owners of the eight founding teams. The NL was substantially better organized than the previous NA, with substantial rule enforcement, financial accountability requirements, and various other institutional improvements.

The NL has been continuously operating since 1876, making it one of the oldest continuously operating professional sports leagues in the world. The various NL teams have included franchises in Boston, Chicago, Cincinnati, Hartford, Louisville, Pittsburgh (later New York), Philadelphia, and St. Louis. Various subsequent franchise additions and removals have produced the modern 15-team NL structure.

The American Association (AA) was established in 1882 as a competing professional baseball league to the NL. The AA was substantially less restrictive than the NL on various commercial and competitive matters, including the various Sunday baseball games (which the NL had prohibited), alcohol sales at games (which the NL had prohibited), and various other commercial activities. The AA operated for 10 seasons (1882-1891) before merging into the NL. The 1891 NL-AA merger produced a 12-team NL, which would eventually be reduced to 8 teams for the modern era.

The American League (AL) was founded by Byron Bancroft "Ban" Johnson in 1901 as a competing professional baseball league to the NL. Johnson had been the president of the Western League, a minor league that he had transformed into the major-level American League. The new AL competed substantially with the NL throughout the 1901-1902 seasons, with substantial player signing disputes producing significant inter-league tensions. The 1903 National Agreement between the NL and AL established the modern two-league structure and produced the first World Series in October 1903.

The first World Series was contested between the NL champion Pittsburgh Pirates (led by player-manager Fred Clarke) and the AL champion Boston Americans (subsequently renamed the Boston Red Sox, led by player-manager Jimmy Collins and pitcher Cy Young). The Americans won the best-of-nine series 5 games to 3, producing the inaugural World Series championship and establishing the broader framework of the modern World Series competition.

The Dead-Ball Era and the Black Sox Scandal

The Dead-Ball Era of professional baseball, extending from approximately 1900 to 1919, was characterized by substantially lower offensive production than subsequent eras. The various baseballs used during the period were less elastic and less responsive than the more lively baseballs that would be introduced in the 1920s. Pitchers were permitted to use various substances on the baseball (including saliva, mud, and various foreign substances) that produced substantially less consistent and substantially less hittable pitches. The various ballparks of the era featured substantially deeper outfield distances than the modern ballparks, with substantial distances limiting the home run production.

The principal individual stars of the Dead-Ball Era included Ty Cobb (the brilliant Detroit Tigers outfielder who won 11 American League batting titles and produced a career batting average of .366, the highest career average in MLB history), Honus Wagner (the brilliant Pittsburgh Pirates shortstop who won 8 NL batting titles), Walter Johnson (the brilliant Washington Senators pitcher who won 417 games and produced 110 career shutouts, an all-time MLB record), Christy Mathewson (the brilliant New York Giants pitcher), Tris Speaker, Eddie Collins, Nap Lajoie, and various others.

The Dead-Ball Era ended substantially with the 1919 Black Sox scandal and the subsequent introduction of more lively baseballs in 1920. The 1919 World Series between the Chicago White Sox and the Cincinnati Reds had been substantially manipulated by various Chicago players who had accepted payments from gamblers to deliberately lose the series. The Reds won the World Series 5 games to 3 in what was widely understood at the time to be a substantial upset. The various subsequent investigations identified the manipulation, with eight Chicago players (subsequently called the "Black Sox") being permanently banned from professional baseball in 1921 by the new MLB Commissioner Kenesaw Mountain Landis.

The Black Sox scandal produced substantial subsequent transformation of professional baseball governance. The introduction of the Commissioner of Baseball position, with Landis being appointed as the first commissioner in 1920, produced substantially centralized authority for governance of the sport. Landis ruled professional baseball with substantial authority from 1920 to 1944, with his various rulings producing substantial subsequent professional baseball governance. The banned Black Sox players included the brilliant outfielder Shoeless Joe Jackson, whose .356 career batting average is one of the highest in MLB history and whose subsequent banning has continued to be a topic of substantial subsequent attention.

Babe Ruth and the Yankees Dynasty

George Herman "Babe" Ruth Jr. emerged in the 1920s as the most accomplished individual player in baseball history and one of the most consequential individual sporting figures of the twentieth century. Ruth had originally been a brilliant pitcher with the Boston Red Sox (winning 89 games as a pitcher with a 2.28 ERA from 1914 to 1919), but his exceptional hitting ability had led to his conversion to outfielder. The Red Sox sold Ruth to the New York Yankees in December 1919 in a transaction that has continued to be cited as one of the most consequential individual trades in any sport.

Ruth's first Yankees season (1920) produced 54 home runs, almost double the previous MLB single-season record of 29 (which Ruth himself had set the previous year with the Red Sox). Ruth's 1921 season produced 59 home runs, his 1927 season produced 60 home runs (the MLB single-season record that stood until Roger Maris broke it in 1961). Ruth's career total of 714 home runs was the MLB career home run record from his retirement in 1935 until Hank Aaron broke it in 1974. His career batting average of .342 and his career on-base plus slugging percentage of 1.164 (the highest in MLB history) confirm his position as one of the most accomplished individual hitters in baseball history.

The New York Yankees dynasty that began with Ruth has been the most accomplished individual franchise in MLB history. The Yankees have won 27 World Series championships (1923, 1927, 1928, 1932, 1936, 1937, 1938, 1939, 1941, 1943, 1947, 1949, 1950, 1951, 1952, 1953, 1956, 1958, 1961, 1962, 1977, 1978, 1996, 1998, 1999, 2000, 2009), more than any other franchise. The team's combination of brilliant individual players, exceptional team cohesion, and substantial competitive intensity produced one of the most extraordinary individual franchise traditions in any sport.

The Yankees dynasties of the 1920s, 1930s, 1940s, 1950s, and 1960s produced extraordinary individual players. Lou Gehrig, the brilliant first baseman who played in 2,130 consecutive games (an MLB record that stood until Cal Ripken Jr. broke it in 1995) before being forced to retire in 1939 due to amyotrophic lateral sclerosis (ALS), which subsequently was named "Lou Gehrig's disease" in his honor. Joe DiMaggio, the brilliant outfielder who produced a 56-game hitting streak in 1941 (an MLB record that has not been seriously challenged). Mickey Mantle, the brilliant switch-hitting outfielder of the 1950s and 1960s. Yogi Berra, the brilliant catcher who won 10 World Series championships, the most by any individual player in MLB history. Whitey Ford, the brilliant pitcher. Don Mattingly, the brilliant first baseman. Derek Jeter, the brilliant shortstop and team captain of the 1996-2000 dynasty. Mariano Rivera, the brilliant closer who is widely cited as the greatest closer in MLB history. And various others have produced extraordinary individual careers.

The Color Barrier and Jackie Robinson (1947)

Professional baseball was substantially racially segregated from the late nineteenth century through 1947, with African American and various other non-white players prohibited from competing in the major leagues. The various African American players who would have been eligible for MLB careers had been required to compete in the Negro Leagues, the parallel professional baseball league system that operated alongside MLB during the period of racial segregation. The Negro Leagues produced extraordinary individual players including Satchel Paige (the brilliant pitcher who would eventually be admitted to MLB in 1948 at age 42 and would pitch in MLB through age 59), Josh Gibson (the brilliant catcher who has been widely cited as one of the most accomplished individual hitters in baseball history), Cool Papa Bell (the brilliant outfielder famous for his exceptional speed), Buck Leonard, Oscar Charleston, and various others.

The broader institutional integration of MLB began with Jackie Robinson's signing by the Brooklyn Dodgers in 1945 and his subsequent 1947 MLB debut. Robinson had been a brilliant multi-sport athlete at UCLA before serving in the U.S. Army during World War II. He had played in the Negro Leagues with the Kansas City Monarchs before being signed by the Dodgers' general manager Branch Rickey, who had been substantially planning the integration of MLB for several years. Robinson's MLB debut on April 15, 1947 (Opening Day for the Dodgers) made him the first African American player in modern MLB history.

Robinson's first MLB season produced extraordinary individual achievements. He won the inaugural Rookie of the Year award (which was subsequently renamed the Jackie Robinson Award), batting .297 with 12 home runs and 29 stolen bases. His subsequent career produced six All-Star Game selections, the 1949 NL Most Valuable Player award, and a career batting average of .311. Robinson's combination of brilliant individual skill, exceptional competitive intensity, and substantial cultural significance produced one of the most extraordinary individual sporting careers in any era.

The integration of MLB continued substantially through the late 1940s and 1950s. The Cleveland Indians signed Larry Doby in 1947 (Doby debuting on July 5, 1947 as the first African American player in the American League). The various other MLB franchises gradually integrated their rosters across the following decade. The last MLB franchise to integrate was the Boston Red Sox, who did not sign their first African American player (Pumpsie Green) until 1959, 12 years after Robinson's debut.

The broader cultural impact of the integration of MLB has been substantial. The various subsequent African American MLB stars including Willie Mays, Hank Aaron, Bob Gibson, Frank Robinson, Reggie Jackson, Rickey Henderson, Ken Griffey Jr., Barry Bonds, and various others have produced extraordinary individual careers. The continued integration of various other ethnic groups including Latino players (with various Cuban, Dominican, Puerto Rican, Venezuelan, Mexican, and various other Latino players producing extraordinary careers), Asian players (with various Japanese, South Korean, and various other Asian players producing extraordinary careers), and various other groups has produced one of the most ethnically diverse professional sports leagues in any sport. Robinson's number 42 was retired by all MLB teams in 1997, the only number retired league-wide in MLB history.

Mid-Century Baseball — Mays, Aaron, Mantle, and Expansion

The mid-twentieth century MLB produced extraordinary individual players who substantially shaped the sport's broader cultural significance. Willie Mays, the brilliant New York/San Francisco Giants outfielder, has been widely cited as one of the most accomplished individual players in baseball history. Mays's career produced 660 home runs, 12 Gold Glove awards (the most by any outfielder), 24 All-Star Game selections, and the 1954 and 1965 NL Most Valuable Player awards. His brilliant over-the-shoulder catch of Vic Wertz's drive in Game 1 of the 1954 World Series, known simply as "The Catch," has been one of the most reproduced moments in baseball history.

Hank Aaron, the brilliant Atlanta Braves outfielder, produced one of the most accomplished individual careers in baseball history. Aaron's career produced 755 home runs (which broke Babe Ruth's previous MLB career home run record on April 8, 1974 and which stood as the MLB career home run record until Barry Bonds broke it in 2007), 25 All-Star Game selections (the most in MLB history), the 1957 NL Most Valuable Player award, and the all-time MLB career RBI record. Aaron's pursuit of Ruth's home run record had been substantially complicated by racial hate mail and various threats, but he successfully completed the chase to break the record on April 8, 1974. He retired in 1976 with 755 career home runs.

Mickey Mantle, the brilliant New York Yankees switch-hitting outfielder of the 1950s and 1960s, produced extraordinary individual achievements despite various injury complications. Mantle's career produced 536 home runs, three NL Most Valuable Player awards (1956, 1957, 1962), the 1956 Triple Crown (leading the AL in batting average, home runs, and RBIs), and 16 All-Star Game selections. Mantle's substantial popular cultural significance produced one of the most marketed individual MLB players of his era.

MLB expanded substantially during the 1960s, with multiple new franchises added to both the AL and NL. The expansion produced franchises in Los Angeles (the Angels, added in 1961 in the AL), Washington (the new Washington Senators in 1961 after the original Senators relocated to become the Minnesota Twins), Houston (the Colt .45s/Astros in 1962 in the NL), New York (the Mets in 1962 in the NL), and various other locations. The 1966 introduction of free agency through the Curt Flood lawsuit (Flood having sued MLB after being traded by the St. Louis Cardinals to the Philadelphia Phillies) eventually produced substantial transformation of the broader MLB labor relations structure.

The broader 1960s MLB also produced various other accomplished players. Sandy Koufax, the brilliant Los Angeles Dodgers pitcher who won three NL Cy Young Awards (1963, 1965, 1966) in the four years preceding his early retirement at age 30 due to recurring elbow injuries. Roberto Clemente, the brilliant Pittsburgh Pirates outfielder who was the first Latino player to win the NL Most Valuable Player award (1966) and who died in a December 1972 plane crash while flying humanitarian aid to earthquake victims in Nicaragua. Bob Gibson, the brilliant St. Louis Cardinals pitcher. Carl Yastrzemski, the brilliant Boston Red Sox outfielder. Frank Robinson, the brilliant outfielder who won the Triple Crown in 1966 and was the first African American MLB manager (with the Cleveland Indians in 1975).

The Brooklyn Dodgers Move to Los Angeles and Other Moves

The 1958 relocation of the Brooklyn Dodgers to Los Angeles and the simultaneous relocation of the New York Giants to San Francisco produced one of the most consequential franchise relocations in any professional sports history. The Brooklyn Dodgers had been the principal underdog franchise of MLB through the 1950s, with the brilliant "Boys of Summer" team led by Jackie Robinson, Roy Campanella, Pee Wee Reese, Duke Snider, and various others having produced one of the most beloved individual franchise traditions in MLB history. The team had finally won their first World Series in 1955 (after multiple previous losses, primarily to the rival New York Yankees) before being relocated to Los Angeles three years later.

The relocation was substantially driven by the Dodgers owner Walter O'Malley's substantial desire for a new ballpark to replace the small and aging Ebbets Field in Brooklyn. After various negotiations with New York City officials failed to produce a satisfactory new ballpark in Brooklyn, O'Malley accepted substantial concessions from Los Angeles city officials (including substantial land acquisition rights for the Chavez Ravine site that would become Dodger Stadium) to relocate the franchise. The simultaneous relocation of the New York Giants to San Francisco was substantially motivated by Giants owner Horace Stoneham's similar concerns about his team's New York location, with the simultaneous Dodgers-Giants relocations producing a substantial new MLB presence on the West Coast.

The 1958-1962 Los Angeles Dodgers played at the Los Angeles Memorial Coliseum (the same stadium that would subsequently host the 1984 Olympics). The substantial substandard playing conditions at the Coliseum (which had been designed for football and athletics rather than baseball) produced substantial competitive irregularities, with the substantially short left field distance producing substantial home run distortions. Dodger Stadium opened in 1962 at the Chavez Ravine location, with the substantial new ballpark providing one of the most accomplished individual MLB ballparks.

The Dodgers' transition to Los Angeles produced extraordinary individual sporting achievements. The team won the World Series in 1959, 1963, 1965, 1981, 1988, 2020, and 2024. The various Dodgers stars from the LA era including Sandy Koufax, Don Drysdale, Maury Wills (the brilliant shortstop who reintroduced base stealing as a substantial offensive weapon in the 1960s), Steve Garvey, Fernando Valenzuela (the brilliant Mexican pitcher who produced the "Fernandomania" phenomenon of 1981), Orel Hershiser, Mike Piazza, Clayton Kershaw, Mookie Betts, and various others have produced extraordinary careers.

The broader subsequent franchise relocations and expansions through the modern era have continued to shape MLB's geographic distribution. The various franchise relocations have included the Philadelphia Athletics to Kansas City to Oakland (eventually to Sacramento and Las Vegas), the Boston Braves to Milwaukee to Atlanta, the St. Louis Browns to Baltimore (becoming the Orioles), the original Washington Senators to Minneapolis (the Twins), and various others. The various subsequent expansions have added franchises in San Diego (Padres), Kansas City (Royals), Toronto (Blue Jays), Seattle (Mariners), Tampa Bay (Rays), Arizona (Diamondbacks), and various others. The MLB has not added expansion franchises since 1998, the longest period without expansion in modern MLB history.

The Steroid Era (1990s-2000s)

The Steroid Era of MLB, extending from approximately the early 1990s through approximately 2007, was substantially shaped by the widespread use of performance-enhancing drugs including anabolic steroids, human growth hormone, and various other substances by various MLB players. The various subsequent investigations including the 2007 Mitchell Report (commissioned by MLB itself and conducted by former U.S. Senate Majority Leader George Mitchell) identified approximately 89 MLB players who had been associated with various performance-enhancing drug use during the era.

The substantial offensive production of the Steroid Era was substantially higher than the historical MLB averages. Various individual single-season records were set during the period including Mark McGwire's 1998 70 home runs (which broke Roger Maris's 37-year-old MLB single-season record of 61), Sammy Sosa's 1998 66 home runs, Barry Bonds's 2001 73 home runs (the current MLB single-season record), and various other extraordinary individual seasons. The various subsequent disclosures and investigations have produced substantial subsequent attention to the legitimacy of these various records.

Barry Bonds, the brilliant San Francisco Giants outfielder, produced the most extraordinary individual statistical achievements of the Steroid Era. Bonds won seven NL Most Valuable Player awards (1990, 1992, 1993, 2001, 2002, 2003, 2004), the most by any player in MLB history. His career produced 762 home runs (the MLB career home run record, breaking Hank Aaron's previous record of 755 on August 7, 2007). His 2001 season produced 73 home runs (the MLB single-season home run record), 137 walks, and 4.41 walks per game. His 2002 season produced .582 on-base percentage, the highest single-season on-base percentage in MLB history. His 2004 season produced 232 walks and .609 on-base percentage, both single-season MLB records.

The broader institutional response to the Steroid Era has been substantial. MLB implemented its first comprehensive drug-testing program in 2004, with substantial subsequent expansions and modifications. The various subsequent positive tests have produced substantial suspensions for various players including Manny Ramirez (50-game suspension in 2009, 100-game suspension in 2011), Alex Rodriguez (162-game suspension for the entire 2014 season), Ryan Braun (65-game suspension in 2013), and various others. The 2013 Biogenesis investigation produced suspensions for approximately 13 MLB players who had been associated with the Biogenesis clinic in Miami.

The broader cultural impact of the Steroid Era has continued to be substantial. The various Hall of Fame voting outcomes for Steroid Era players have produced extensive subsequent discussion, with various players including Bonds, Roger Clemens, Mark McGwire, Sammy Sosa, and various others having failed to receive the necessary votes for Hall of Fame induction despite their statistical accomplishments. The various subsequent broader reflections on the era have continued to shape professional baseball's cultural significance. The various ongoing legal proceedings (including Bonds's 2007 perjury indictment, which was eventually dismissed in 2015) have continued through subsequent years.

The Boston Red Sox 2004 and the Chicago Cubs 2016

The 2004 Boston Red Sox World Series championship was one of the most extraordinary individual championship victories in the history of any professional sports league. The Red Sox had not won the World Series since 1918, an 86-year drought that had been substantially attributed to the "Curse of the Bambino" — the team's 1919 sale of Babe Ruth to the New York Yankees that had supposedly cursed the team to subsequent World Series losses. The various near-miss championship campaigns of the Red Sox across the previous 86 years had produced substantial subsequent cultural attention.

The 2004 Red Sox playoff run produced one of the most extraordinary individual sporting moments in any sport. The team had been substantially down 3-0 in the American League Championship Series against the rival New York Yankees, with no MLB team having ever come back from a 3-0 deficit in a postseason series. The Red Sox subsequently won the next four games against the Yankees, becoming the first team to come back from a 3-0 series deficit in MLB postseason history. The team then defeated the St. Louis Cardinals 4-0 in the World Series to claim the franchise's first championship since 1918.

The brilliant 2004 Red Sox roster included Curt Schilling (the brilliant pitcher who had famously pitched Game 6 of the ALCS with an ankle that had been substantially injured, with substantial visible blood on his sock during the game), Manny Ramirez (the brilliant outfielder who was named the World Series MVP), David Ortiz (the brilliant designated hitter who produced multiple game-winning hits throughout the playoff run), Pedro Martínez (the brilliant pitcher), Johnny Damon (the brilliant outfielder), Jason Varitek (the brilliant catcher and team captain), and various others. The Red Sox subsequently won additional World Series championships in 2007, 2013, and 2018.

The 2016 Chicago Cubs World Series championship was another extraordinary individual championship victory. The Cubs had not won the World Series since 1908, a 108-year drought that had been substantially the longest championship drought in any professional sports league. The various near-miss championship campaigns of the Cubs across the previous 108 years had produced substantial subsequent cultural attention. The 1969 Cubs collapse had been particularly substantially attributed to the "Curse of the Billy Goat" — a fan and his pet goat having been ejected from a 1945 World Series game at Wrigley Field, with the fan having allegedly cursed the team to future World Series losses.

The 2016 Cubs playoff run produced extraordinary individual moments. The team won the NL pennant with a brilliant series victory over the Los Angeles Dodgers in the NLCS. The 2016 World Series against the Cleveland Indians (now Cleveland Guardians) produced one of the most extraordinary World Series in MLB history, with the Cubs winning Game 7 in extra innings to claim the championship 4 games to 3. The Cubs had come back from a 3-1 series deficit, with the substantial cultural celebration across Chicago producing approximately 5 million Cubs fans attending the team's victory parade through Chicago, one of the largest gatherings in human history.

The brilliant 2016 Cubs roster included Anthony Rizzo (the brilliant first baseman), Kris Bryant (the brilliant third baseman who won the NL MVP award in 2016), Jake Arrieta (the brilliant pitcher who won the 2015 NL Cy Young Award), Jon Lester (the brilliant pitcher), Kyle Schwarber (the brilliant outfielder), Addison Russell (the brilliant shortstop), Javier Báez (the brilliant infielder), Theo Epstein (the brilliant team president who had previously assembled the 2004 Red Sox championship team), Joe Maddon (the brilliant manager), and various others.

The Modern Era — Trout, Judge, and Ohtani

The modern era of MLB has produced extraordinary individual players who have continued the broader baseball tradition. Mike Trout of the Los Angeles Angels emerged in the early 2010s as the most accomplished individual player of his generation. Trout has won three AL Most Valuable Player awards (2014, 2016, 2019), been named to 11 All-Star Games, and produced one of the most consistently brilliant individual statistical careers in modern MLB history. His various contracts including the 12-year, 426.5 million dollar contract signed in 2019 (then the largest contract in any professional sports history) have made him one of the most well-compensated individual professional athletes.

Trout's career has been substantially complicated by various injuries through the late 2010s and 2020s. The Angels' failure to surround Trout with a competitive team has been one of the recurring storylines of modern MLB, with the team having failed to reach the postseason during Trout's tenure despite his individual brilliance. The continued substantial expectations for Trout's career achievements have been substantial subject to discussion.

Shohei Ohtani of the Los Angeles Angels (subsequently Dodgers) emerged in the late 2010s as one of the most extraordinary individual players in any era of baseball. Ohtani had previously been the dominant individual player in the Japanese NPB (Nippon Professional Baseball) league before joining the Angels in 2018 at age 23. His combination of brilliant pitching and brilliant hitting has produced one of the most extraordinary two-way careers in baseball history, with Ohtani having produced significant statistical achievements as both a pitcher and a hitter. He won the AL Most Valuable Player award in 2021, 2023, and 2024 (the latter as the Dodgers' designated hitter following his free-agent signing with the team in December 2023 for a record 700 million dollar contract).

Ohtani's 2024 season produced extraordinary individual achievements. He became the first MLB player to produce 50 home runs and 50 stolen bases in a single season, with his final statistics of 54 home runs and 59 stolen bases producing the new "50-50" benchmark. He won the 2024 World Series with the Dodgers, defeating the New York Yankees 4-1. He won the 2024 AL Most Valuable Player award (his third MVP award in four years), becoming one of the most decorated individual players of the modern era.

Aaron Judge of the New York Yankees has produced extraordinary individual achievements through the modern era. Judge's 2022 season produced 62 home runs, breaking Roger Maris's 61-year-old American League single-season home run record (which had stood since 1961). He won the 2022 AL Most Valuable Player award and was named to multiple All-Star Games. His 2024 season produced 58 home runs and was substantially considered for MVP voting alongside Ohtani's brilliant Dodgers season.

Various other modern MLB stars have produced extraordinary individual careers. Mookie Betts (the brilliant Los Angeles Dodgers outfielder, with multiple championships and All-Star selections), Bryce Harper (the brilliant Philadelphia Phillies outfielder), Manny Machado (the brilliant San Diego Padres infielder), Jose Altuve (the brilliant Houston Astros second baseman), Juan Soto (the brilliant outfielder), Ronald Acuña Jr. (the brilliant Atlanta Braves outfielder), Vladimir Guerrero Jr. (the brilliant Toronto Blue Jays first baseman), and various others have continued the broader MLB individual tradition.

The Negro Leagues

The Negro Leagues operated as a parallel professional baseball league system alongside MLB during the period of MLB's racial segregation (approximately 1885 through 1947). The various Negro Leagues teams competed against each other and against various touring barnstorming teams, with the various Negro League players producing some of the most accomplished individual baseball careers in any era. The 2020 MLB official recognition of the Negro Leagues as major leagues has retroactively recognized the various Negro League statistics as official MLB statistics, with various subsequent recalculations producing substantial subsequent attention.

The principal Negro League teams included the Kansas City Monarchs (one of the most accomplished individual Negro League franchises, with various championships across the league's history), the Homestead Grays (located in Homestead, Pennsylvania and subsequently in Washington D.C.), the Pittsburgh Crawfords (the dominant Negro League team of the early 1930s, owned by the gangster Gus Greenlee), the Newark Eagles, the New York Cubans, the Birmingham Black Barons, the Memphis Red Sox, and various others.

The Negro League stars produced extraordinary individual careers. Satchel Paige (the brilliant pitcher who is widely cited as the most accomplished individual Negro League pitcher and one of the most accomplished pitchers in any era of baseball, with his career extending from approximately 1926 through his eventual MLB debut at age 42 in 1948), Josh Gibson (the brilliant catcher who has been widely cited as the most accomplished individual Negro League hitter, with various accounts suggesting career home runs approaching 800; the 2020 MLB statistical recognition has resulted in Gibson's recognized batting average of .372 becoming the highest official MLB career batting average), Cool Papa Bell (the brilliant outfielder famous for his exceptional speed, with various legends suggesting that he could turn out a light switch and be in bed before the room went dark), Buck Leonard (the brilliant first baseman), Oscar Charleston (the brilliant outfielder/first baseman widely cited as one of the most accomplished individual players in any era), Buck O'Neil (the brilliant first baseman who subsequently became a substantial public figure as a Negro League historian), and various others.

The Negro Leagues officially ended in 1947 with Jackie Robinson's MLB debut, with the substantial subsequent integration of MLB producing substantial decline in the various Negro League franchises. The various Negro League teams continued operating with substantially reduced rosters and substantially reduced commercial success through the early 1950s before most teams folded. The various Negro League stars who had been substantially past their playing prime by the time of MLB integration in 1947 did not have the opportunity to play in MLB. The various subsequent recognition of these players including the establishment of the Negro Leagues Baseball Museum in Kansas City in 1990 and the Hall of Fame induction of various Negro League players has continued to address the broader historical question of how these players should be remembered.

Economics, Modern Era, and Conclusion

The economic scale of modern MLB has continued to grow substantially. The league's total annual revenue in 2024 was approximately 12 billion dollars, with the various media rights, sponsorship deals, ticket sales, merchandise sales, and various other revenue streams producing the principal commercial structure. The various franchise valuations have grown substantially across the past two decades, with the most valuable franchises (including the New York Yankees, Los Angeles Dodgers, Boston Red Sox, and Chicago Cubs) now valued at more than 5 billion dollars each.

MLB does not have a salary cap, distinguishing it from the NFL, NBA, and NHL (all of which have salary caps). The various team payrolls have varied substantially as a result, with the largest team payrolls (including the New York Mets, Los Angeles Dodgers, and New York Yankees) reaching more than 300 million dollars annually in recent years while the smaller team payrolls (including various small-market teams) have been approximately 80-100 million dollars annually. The substantial payroll disparities have produced substantial competitive imbalance concerns that have been the subject of recurring institutional discussion.

The Shohei Ohtani 2023 contract with the Los Angeles Dodgers (10 years, 700 million dollars total) was the largest contract in any professional sports history at the time of signing. The various other recent contracts including Juan Soto's 2024 contract with the New York Mets (15 years, 765 million dollars) have continued to set new salary records. The continued substantial growth in MLB salaries has produced substantial growth in the player wealth landscape.

The broader MLB international expansion has continued through the modern era. The various international MLB games including the various Tokyo Series games, the various London Series games, the various Mexico City series games, and various others have produced substantial commercial revenue and substantial subsequent attention. The continued substantial Latin American MLB player development through various Dominican and Venezuelan academies has continued to produce substantial talent. The continued substantial Japanese player participation including the brilliant Ichiro Suzuki, Hideki Matsui, Shohei Ohtani, Yu Darvish, Masahiro Tanaka, and various others has continued to expand the league's international reach.

Professional baseball will continue to evolve. The continued institutional response to the various pace-of-play concerns (including the 2023 introduction of the pitch clock that has substantially shortened MLB game times), the continued growth of MLB's broader cultural significance, the continued substantial commercial expansion of the league, the continued substantial international player participation, and various other changes will all continue to shape the sport in the coming decades. Yet the basic appeal of baseball — the distinctive combination of individual matchups (each at-bat being effectively a one-on-one contest between the pitcher and the batter), team strategy, the substantial historical continuity of the sport, and the substantial cultural significance of the various ballparks and various traditions — has now lasted for more than 175 years and shows no sign of fading. Major League Baseball remains one of the great cultural institutions of the modern world.

Sources

Ken Burns and Geoffrey C. Ward, Baseball: An Illustrated History (Knopf, 1994).

Bill James, The New Bill James Historical Baseball Abstract (Free Press, 2001).

Jonathan Eig, Opening Day: The Story of Jackie Robinson's First Season (Simon and Schuster, 2007).

Jonathan Eig, Luckiest Man: The Life and Death of Lou Gehrig (Simon and Schuster, 2005).

Jane Leavy, The Last Boy: Mickey Mantle and the End of America's Childhood (HarperCollins, 2010).

Jane Leavy, Sandy Koufax: A Lefty's Legacy (HarperCollins, 2002).

David Maraniss, Clemente: The Passion and Grace of Baseball's Last Hero (Simon and Schuster, 2006).

Roger Kahn, The Boys of Summer (Harper and Row, 1972).

Game of Shadows: Barry Bonds, BALCO, and the Steroid Scandal That Rocked Professional Sports by Mark Fainaru-Wada and Lance Williams (Gotham, 2006).

Thomas Boswell, How Life Imitates the World Series (Doubleday, 1982).

Michael Lewis, Moneyball: The Art of Winning an Unfair Game (W. W. Norton, 2003).

Lawrence S. Ritter, The Glory of Their Times (Macmillan, 1966).

Buck O'Neil, I Was Right on Time (Simon and Schuster, 1996).

BBC Sport baseball coverage, bbc.co.uk/sport/baseball (records and archives).

National Baseball Hall of Fame archives, Cooperstown, New York (institutional records of professional baseball).