Rizzo gave the Cubs a 4-3 lead with his 21st home run with two outs in the seventh, but he was charged with a throwing error that led to the Pirates' go-ahead run in the bottom of the inning. The Pirates had runners at first and second when John Jaso hit an RBI single to tie the game and chase Arrieta.
Gregory Polanco was safe on an errant throw by Rizzo to pitcher Travis Wood, who was covering first, which allowed another run to score. Andrew McCutchen added an RBI single to open a 6-4 lead and another run tallied when Starling Marte hit into a fielder's choice.