Lopez blocked Crowder’s shot, but the ball went to Al Horford, who attacked the basket. As Lopez tried to rotate to contest another shot, he couldn’t move. Crowder, who’d fallen to the floor, had him in a leg-lock. Lopez freed himself just in time to foul Horford.
Adding insult to avoided injury, Lopez got hit with a technical foul for complaining about the no-call.
I bet the league issues a technical foul on Crowder, too.