CHICAGO, IL- APRIL 15: A young fan can be seen wearing a #42 jersey in honor of Jackie Robinson Day prior to the game between the Detroit Tigers against the Chicago White Sox at U.S. Cellular Field on April 15, 2012 in Chicago, Illinois. Both teams wore the number 42 in honor of Jackie Robinson Day. (Photo by Scott Boehm/Getty Images)
Today, in honor Jackie Robinson, the first African American to play in the Major League, all players and coaches wore his number 42 instead of their own numbers. Robinson's number has been universally retired by all MLB teams. After the Yankees Mariano Rivera finally retires, the number 42 will only be worn on Jackie Robinson Day.
42 Jackie Robinson Day, April 15, 2012