PITTSBURGH, PA - JUNE 16: Ian Happ #8 of the Chicago Cubs throws to first base for a force out of Gregory Polanco #25 of the Pittsburgh Pirates in the fourth inning during the game at PNC Park on June 16, 2017 in Pittsburgh, Pennsylvania. In honor of African American Heritage Night, both teams are wearing throwback uniforms from the Negro League. (Photo by Justin Berl/Getty Images)
