The 2013 Major League Baseball season started on March 31 with a Sunday night game between the Texas Rangers and the Houston Astros.
The regular season ended on September 30, extended one day for a one-game playoff between the Tampa Bay Rays and the Texas Rangers to decide the second American League Wild Card winner.
With the Astros' move to the AL, giving both leagues 15 teams, interleague play occurred throughout the entire season for the first time in MLB history.
The Major League Baseball All-Star Game's 84th edition was held on July 16 at Citi Field, home of the New York Mets, with the AL defeating the NL, 3–0.
The season ended with the Boston Red Sox winning the World Series at Fenway Park for the first time since 1918, defeating the St. Louis Cardinals in six games.
This marked the last time a team clinched the World Series on their home field until 2022, where the Houston Astros won their second championship at Minute Maid Park.
In 2012, these season series ranged anywhere from five to ten games, creating large disparities between teams' strengths of schedule.
[153] In addition to batting practice and spring training games, Major League Baseball has also allowed the use of the new caps during regular season play.
[154] The Houston Astros unveiled a new/old identity at a fan event November 2, 2012, at Minute Maid Park, as the team reverted to the orange and navy colors used from their inception in 1962 through 1993.
[159] On January 24, 2013, the Chicago White Sox announced they will be wearing 1983 throwback uniforms on Sunday home games to celebrate the 30th anniversary of their 1983 division title.
The Brewers have also worn a Latin Nights version of the gold uniform (with 'Cerveceros' wordmark) the last two seasons, and would wear them again on June 8 against the Phillies.
[162] As part of the franchise's 20th anniversary, the Colorado Rockies wore their original grey away uniforms at Coors Field on April 16 against the Mets.
The San Diego Padres wore their orange, gold and brown home throwbacks from the 1984 season against the Washington Nationals on May 17.
Despite the game taking place at Progressive Field, the Indians wore the road version of the Bronchos uniforms (navy jersey, cap, and pants, with black socks).
The White Sox, in celebration of their 1983 AL West champion team, donned 1983-replica jerseys during each Sunday home game, as well as other select occasions.
The 1961–65 throwbacks were worn again on September 5 against the Rays to pay tribute to Bobby Knoop's induction to the Angels Hall of Fame.
The San Francisco Giants wore special uniforms to commemorate their 2012 World Series win on April 7.
On the same day, the Seattle Mariners wore a modified version of their white uniforms against the Rays, featuring 'Marineros' in front.
The Milwaukee Brewers wore special batting practice uniforms against the Braves on June 23 for Polish Heritage Day.
The Arizona Diamondbacks wore special black uniforms during their homestand from July 5–14 to commemorate the 19 firefighters who perished in the Yarnell Hill Fire.
The Tigers wore a Hispanic-flavored home uniform against the White Sox on August 3 as part of the 'Fiesta Tigres' promotion.
ESPN aired games on Sundays, most Mondays, and Wednesdays, in addition to a four-game Opening Day schedule.
[164] On March 1, 2013, Fox Sports South and SportSouth announced they have picked up 45 more Atlanta Braves games, ending the team's contract with WPCH-TV.