The number 42 was officially retired by Major League Baseball in 1997, but Mo Vaughn was one of a handful of players to continue wearing number 42 through a grandfather clause. He last wore it for the team in 1998. In commemoration of Jackie Robinson Day, MLB invited players to wear the number 42 for games played on April 15, Coco Crisp (CF), David Ortiz (DH), and DeMarlo Hale (Coach) did that in 2007 and again in 2008. Starting in 2009, MLB had all uniformed players for all teams wear number 42 for Jackie Robinson Day.