Jacob deGrom decided to have a little fun before NY's game Tuesday ... horsing around with a teammate in pregame warmups -- and it has Mets fans absolutely TRIGGERED!!!
The scene was captured by MLB Network cameras hours before the Mets' game against the Braves in Atlanta ... and it was pretty silly -- deGrom wrestled a teammate to the ground in hilarious WWE fashion.
Seriously, the play fighting was actually funny ... deGrom pulled the shirt over his teammate's head, threw him to the ground -- and then another Met came in to count down the pin!