I haven’t done the research to determine just how far back the tradition of baseball teams wearing green on St. Patrick’s Day truly goes, but some believe that it may go back quite a ways. The 1899 Philadelphia Phillies introduced their new, green-trimmed uniforms on March 17th, a move that garnered headlines. Considering the Phillies wore these uniforms for the rest of the season, there remains some debate as to whether this could truly be considered a nod to St. Patrick’s Day. The modern tradition of wearing green on this day wouldn’t emerge until 1978, beginning with the Cincinnati Reds.