The Braves wore Atlanta Black Crackers throwbacks. The Mariners and Astros wore 1980s throwbacks August 2. The uniforms replaced the 1972 red pinstriped throwbacks from last season. Their gimmick was a pair of Vaudeville-era throwbacks. The Astros wore 1997 Major League Baseball season throwbacks August 19. The Indians wore red 1970s throwbacks August 12. The Orioles and Astros wore 1989 throwbacks August 9. The Reds and Brewers wore Negro Leagues throwbacks August 12. The Orioles wore 1992 Major League Baseball season throwbacks on August 19. The 49ers chose to wear a version of their 1955 uniforms as throwbacks. The Astros and Mariners wore 1977 throwbacks June 24. The Tigers and Royals wore Negro Leagues throwbacks May 6. The Indians and Tigers wore Negro Leagues throwbacks July 1. The Cubs and Pirates wore Negro Leagues throwbacks June 16. The Twins and Royals wore Negro Leagues throwbacks June 23.