The greatest competitor in the history of "The Challenge" ain't playin' real football anytime soon ... 'cause dude was straight-up ROCKED by the NFL's Maurkice and Mike Pouncey on Thursday!!
Unclear why Johnny Bananas was in Boca Raton, Florida training with NFLers Mark Ingram, Carl Lawson and the Pouncey twins ... but the MTV show's star openly accepted the invitation for the beatdown when it all went down.
Egged on by Ingram ... Bananas tried pass-rushing on the Pounceys -- who are anchors on the Steelers' and Chargers' O-lines -- and the reps didn't go well for Johnny.