Each team has a retro uniform that can be unlocked by performing various tasks in season mode.
Uniform - How to unlock
Arizona Diamondbacks Retro Uniform - Hit both a game-tying home run and a walk-off home run in the same game as the Diamondbacks.
Atlanta Braves Retro Uniform - Hit 2 home runs in an inning as the Braves.
Baltimore Orioles Retro Uniform - Hit 3 home runs in 3 consecutive games with the same player as the Orioles.
Boston Red Sox Retro Uniform - Steal 4 bases with the same player in a single game as the Red Sox.
Chicago Cubs Retro Uniform - Get 12 RBIs from pitchers over 30 games as the Cubs.
Chicago White Sox Retro Uniform - Get 5 hits from the same player in a single game as the White Sox.
Cincinnati Reds Retro Uniform - Hit 4 home runs in a single game as the Reds.
Cleveland Indians - Score first in 12 straight games as the Indians.
Colorado Rockies Retro Uniform - Get a hit with the same player in 20 straight games as the Rockies.
Detroit Tigers Retro Uniform - Get two home runs in a game with the same player 3 times as the Tigers.
Houston Astros Retro Uniform - Hit a single, double, triple, and home run in the same game as the Astros.
Kansas City Royals - Win after trailing by 4 runs as the Royals.
Los Angeles (Brooklyn) Dodgers Retro Uniform - Hit a grand slam with a pinch hitter as the Dodgers.
Los Angeles (California) Angels of Anaheim Retro Uniform - Get 3 extra-base hits with the same player in a single game as the Angels.
Miami (Florida) Marlins Retro Uniform - Have the starting pitcher record 9 strikeouts while allowing no runs over 7 innings as the Marlins.
Milwaukee Brewers Retro Uniform - Win with a walk-off home run after trailing by 4 runs as the Brewers.
Minnesota Twins Retro Uniform - Get 2 consecutive shutouts as the Twins.
New York Mets Retro Uniform - Allow 10 hits or fewer and get 25 strikeouts over 3 wins as the Mets.
New York Yankees Retro Uniform - Get 4 RBIs in 2 consecutive games with the same player as the Yankees.
Oakland Athletics Retro Uniform - Get 9 saves with a reliever over 10 consecutive save opportunities as the Athletics.
Philadelphia Phillies Retro Uniform - Score 4 runs in the 10th inning or later as the Phillies.
Pittsburgh Pirates Retro Uniform - Get 15 RBIs over 10 consecutive games with the same player as the Pirates.
San Diego Padres Retro Uniform - Get 7 home runs and 20 RBIs over 25 consecutive games with the same player as the Padres.
San Francisco Giants Retro Uniform - Get a hit from every player in the starting lineup, including the pitcher, as the Giants.
Seattle Mariners Retro Uniform - Score 4 runs in the 10th inning or later as the Mariners.
St. Louis Cardinals Retro Uniform - Pitch a shutout with 12 strikeouts as the Cardinals.
Tampa Bay (Devil) Rays Retro Uniform - Get 8 strikeouts over 5 consecutive innings as the Rays.
Texas Rangers Retro Uniform - Get 2 consecutive shutouts as the Rangers.
Toronto Blue Jays Retro Uniform - Get 8 strikeouts over 5 consecutive innings as the Blue Jays.
Washington Nationals (Montreal Expos) Retro Uniform - Get 30 hits over 100 consecutive at-bats as the Nationals.