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Today is the 62nd anniversary of Jackie Robinson breaking Major League Baseball's color barrier and, in honor of that, every player in the game will be wearing number 42 on their backs today.

In 2007, Commissioner Bud Selig allowed players to wear the number if they chose. The entire Dodgers team wore the number and then more teams followed suit last season. This is the first time that all players will wear the number.

All 15 stadiums that host games today will honor Robinson with a ceremony, but the biggest one will be at the Mets' Citi Field as they dedicate the Jackie Robinson Rotunda, which is at their new ballpark. That ceremony begins at 12:30pm ET. Robinson never played for the Mets, but did play in New York for the Dodgers, and Mets owner Fred Wilpon was a huge Brooklyn Dodgers fan growing up.