Crowder crumpled to the floor , sustaining a sprained left knee ligament .
Smith , too , is facing disciplinary action after he was ejected for swinging a clenched fist and smacking Boston 's Jae Crowder in the jaw .
Jae Crowder crumpled to the floor , sustaining a sprained left knee ligament .
Smith , too , is facing disciplinary action after he was ejected for swinging a clenched fist and smacking Boston 's Jae Crowder in the jaw .