The 2005 Major League Baseball season was notable for the league's new steroid policy in the wake of the BALCO scandal, which enforced harsher penalties than ever before for steroid use in Major League Baseball. Several players, including veteran Rafael Palmeiro, were suspended under the new policy. Besides steroids it was also notable that every team in the NL East finished the season with at least 81 wins. Additionally it was the first season featuring a baseball team in Washington, D.C. since the second iteration of the Washington Senators last played there in 1971; the Washington Nationals had moved from Montreal, the first relocation of a team in 34 years and currently the last time this has occurred in the majors.
The 2004 Major League Baseball season ended when the Boston Red Sox defeated the St. Louis Cardinals in a four-game World Series sweep. The Red Sox championship ended an 86-year-long drought known as the Curse of the Bambino. The Red Sox were also the first team in MLB history and the third team from a major North American professional sports league ever to come back from a 3–0 postseason series deficit and win. This happened in the ALCS against the New York Yankees.
The 2003 Major League Baseball season ended when the Florida Marlins defeated the New York Yankees in a six-game World Series. The Detroit Tigers set the American League record for losses in a season, with 119, and the Marlins became the first team to win the championship twice as a wild card.
The 2006 Major League Baseball season ended with the National League's St. Louis Cardinals winning the World Series with the lowest regular-season victory total (83) in a fully-played season in major league history. The Atlanta Braves failed to qualify for the postseason for the first time since 1991. Individual achievements included Barry Bonds who, despite questions surrounding his alleged steroid use and involvement in the BALCO scandal, surpassed Babe Ruth for second place on the career home runs list. The American League continued its domination at the All-Star Game by winning its fourth straight game, and ninth of the prior 10 contests.
The 2001 Major League Baseball season finished with the Arizona Diamondbacks defeating the New York Yankees in seven games for the World Series championship. The September 11 terrorist attacks on New York and Washington, D.C. pushed the end of the regular season from September 30 to October 7. Because of the attacks, the World Series was not completed until November 4. The 2001 World Series was the first World Series to end in November.
The 1997 Major League Baseball season was the inaugural season for Interleague play, as well as the final season in the American League for the Milwaukee Brewers before moving to the NL the following season. The California Angels changed their name to the Anaheim Angels. The Florida Marlins ended the season as the World Champions defeating the Cleveland Indians in a seven-game World Series, four games to three.
The 1996 Major League Baseball season was the final season of league-only play before the beginning of interleague play the following season. The season ended with the New York Yankees defeating the defending champion Atlanta Braves in six games for the World Series title, the Yankees' first championship since 1978. The record for most home runs hit in an MLB regular season, set at 4,458 in 1987, was broken, as the AL and NL combined to hit 4,962 home runs. Only 196 shutouts were recorded in the 2,266 MLB regular-season games. This was the first season in the Divisional Series era to be played to the full 162 games, as the 1994–95 player's strike caused the first two seasons of the era to be abbreviated.
The 1990 Major League Baseball season saw the Cincinnati Reds upset the heavily favored Oakland Athletics in the World Series, for their first title since 1976.
The 1986 Major League Baseball season saw the New York Mets win their second World Series title, their first since 1969.
The 1987 Major League Baseball season ended with the American League Champion Minnesota Twins winning the World Series over the National League Champion St. Louis Cardinals, four games to three, as all seven games were won by the home team.
The 1984 Major League Baseball season started with a 9-game winning streak by the eventual World Series champions Detroit Tigers who started the season with 35 wins and 5 losses and never relinquished the first place lead.
The 1980 Major League Baseball season concluded with the Philadelphia Phillies winning their first World Series championship.
The 1959 Major League Baseball season was played from April 9 to October 9, 1959. It saw the Los Angeles Dodgers, free of the strife produced by their move from Brooklyn the previous season, rebound to win the National League pennant after a two-game playoff against the Milwaukee Braves, who themselves had moved from Boston in 1953. The Dodgers won the World Series against a Chicago White Sox team that had not played in the "Fall Classic" since 1919 and was interrupting a Yankees' dynasty that dominated the American League between 1949 and 1964.
In the 1978 Major League Baseball season, the New York Yankees defeated the Los Angeles Dodgers to win their second consecutive World Series, and 22nd overall, in a rematch of the prior season's Fall Classic. The Yankees overcame clubhouse turmoil, a mid-season managerial change, and a 14-game mid-July deficit in the American League East en route to the championship. All four teams that made the playoffs in 1977 returned for this postseason; none of the four returned to the postseason in 1979.
The 1975 Major League Baseball season saw Frank Robinson become the first black manager in the Major Leagues. He managed the Cleveland Indians.
The 1951 Major League Baseball season opened on April 16 and finished on October 12, 1951. Teams from both leagues played a 154-game regular season schedule. At the end of the regular season, the National League pennant was still undecided, resulting in a three-game playoff between the New York Giants and the Brooklyn Dodgers. After splitting the first two games, the stage was set for a decisive third game, won in dramatic fashion on a walk-off home run from the bat of Giant Bobby Thomson, one of the most famous moments in the history of baseball, commemorated as the "Shot Heard 'Round the World" and "The Miracle at Coogan's Bluff". The Giants lost the World Series to defending champion New York Yankees, who were in the midst of a 5-year World Series winning streak.
The 1953 Major League Baseball season was contested from April 13 to October 12, 1953. It marked the first relocation of an MLB franchise in fifty years, as the Boston Braves moved their NL franchise to Milwaukee, where they would play their home games at the new County Stadium. This was also the first regular season of the televised Major League Baseball Game of the Week, originally broadcast on ABC.
The 1961 Major League Baseball season was played from April 10 to October 12, 1961. That season saw the New York Yankees defeat the Cincinnati Reds in five games in the World Series. The season is best known for Yankee teammates Roger Maris' and Mickey Mantle's pursuit of Babe Ruth's prestigious 34-year-old single-season home run record of 60. Maris ultimately broke the record when he hit his 61st home run on the final day of the regular season, while Mantle was forced out of the lineup in late September due to a hip infection and finished with 54 home runs.
The 2009 Major League Baseball season began on April 5, 2009; the regular season was extended two days for a one-game playoff between the Detroit Tigers and the Minnesota Twins for the American League Central title. The postseason began the next day with the Division Series. The World Series began on October 28, and ended on November 4, with the New York Yankees defeating the Philadelphia Phillies in six games. This was the second time the season was completed in November. The only other occasion was the 2001 World Series, because of the delaying of the end of that season due to the September 11 attacks as November baseball would be guaranteed when Game 4 was played on Sunday, November 1. Had the 2009 World Series gone the full seven games, Game 7 would've been played on November 5, the latest date ever scheduled for a World Series game. American League champion had home field advantage for the World Series by virtue of winning the All-Star Game on July 14 at Busch Stadium in St. Louis, Missouri, 4–3. In addition, the annual Civil Rights Game became a regular season game, and was played June 20 at Great American Ball Park in Cincinnati, Ohio, when the host Cincinnati Reds lost to the Chicago White Sox in an interleague game, 10–8. Both teams wore replicas of their 1965 uniforms in the contest.
The 2010 Major League Baseball season began April 4, with the regular season ending on October 3. The 2010 All-Star Game was played on July 13 at Angel Stadium of Anaheim in Anaheim, California. The National League ended a 13-game winless streak with a 3–1 victory. Due to this result, the World Series began October 27 in the city of the National League Champion, the San Francisco Giants, and ended November 1 when the Giants defeated the American League Champion Texas Rangers, four games to one.
