CHICAGO, IL – APRIL 15: Andrew McCutchen #22 of the Pittsburgh Pirates (L) is congratulated by David Freese #23 after hitting a three run home run against the Chicago Cubs during the seventh inning at Wrigley Field on April 15, 2017 in Chicago, Illinois. All players are wearing #42 in honor of Jackie Robinson Day. (Photo by Jon Durr/Getty Images)

MLB

Jackie Robinson Day makes players and fans of all races—and baseball as a whole—think about what integration means