Micah Parsons is used to putting the hurt on quarterbacks, but it was the Dallas Cowboys star who was in a world of pain recently -- taking body shots from pro boxer AJ Graham!!
The 24-year-old linebacker was with the undefeated featherweight fighter this week at TMack Elite Training in Texas ... testing out the combat sport as part of his offseason workout routine.
At one point, Parsons and Graham ditched the punching bags for their own human bodies ... trading vicious blows until one of them backed out.