Chapman struck out Justin Ruggiano to start the inning. Then he sailed a 101-mph fastball over the head of Nate Schierholtz on the first pitch of his at-bat. The second pitch was 100 mph and similarly buzzed the tower, causing several Cubs players to grow upset.
Chapman eventually struck out Schierholtz, walked John Baker, and got a groundout to end the inning. The benches cleared after the third out because the Cubs seemingly took offense to Chapman waving his glove at their dugout in a dismissive motion after the out:
Anthony Rizzo also said something to the Reds as he took the field for the bottom of the inning, sparking the benches to clear.
Warnings were issued, but nobody was thrown out of the game.