Last month, baseball celebrated the 70th anniversary of Jackie Robinson's debut in the major leagues. 

But seven decades after the first black player joined the majors, the sport is still suffering from bouts of racism — particularly in Boston. 

Baltimore Orioles center fielder Adam Jones said he was subjected to racist taunts Monday night at Fenway Park. Since then, Massachusetts Gov. Charlie Baker, Boston Mayor Marty Walsh and Major League Baseball Commissioner Rob Manfred have all called the conduct "unacceptable." 

"I heard the N-word," Jones said Tuesday, a day after the Orioles beat the Red Sox, 5-2. "It was not clever. It was stupid and ignorant."