Kemp was attempting to score from second base on Enrique Hernandez's two-out single to right field in the bottom of the third inning. But with Chirinos receiving the throw well ahead of him, Kemp lowered his shoulder and barreled into him.
After Kemp was tagged out to end the inning, Chirinos got up and shoved him. Kemp returned the shove and both benches and bullpens emptied and formed a scrum at the plate.
Rules have been put in place to outlaw runners from plowing into catchers, and catchers have to give runners a lane to the plate in most cases. In this play, the throw home took Chirinos directly into Kemp's path to the plate.
The Associated Press contributed to this report.