The National Football League, after reviewing videotapes of last Sunday's Patriots-Bears game, has found no evidence to support a claim by Chicago coach Mike Ditka that New England defensive end Brent Williams deliberately injured Bears quarterback Jim McMahon.

Ditka requested the review after viewing tapes that showed Williams continued to lift McMahon's leg after McMahon was tackled and lying on the ground during the second quarter of the game at Foxboro, Mass.Locally . . .