Benches cleared during the Cincinnati Reds and Chicago Cubs' showdown after two Aroldis Chapman pitches upset the Cubs dugout.
Facing Chicago's Nate Schierholtz, Chapman threw two fastballs up and in near the Cubs hitter's head.
Chapman would go on to strike out Schierholtz, and as he walked off the rubber to prepare for his next batter, Chicago's Anthony Rizzo yelled at him from the dugout.
To add fuel to the fire, Chapman waved to the Cubs dugout following the third out of the inning, and when Rizzo took the field, he continued to express his dismay. Once Rizzo threw his hat and glove on the ground, the argument reached its boiling point.
Umpires eventually got the disagreement under control with no punches thrown. Chicago won 6-4 in 12 innings.