Clemson defensive end Da'Quan Bowers didn't participate in drills at the NFL Scouting Combine on Monday as expected. Bowers didn't run the 40-yard dash and is sitting out the other drills. He announced Saturday that he wouldn't test because of a meniscus tear he suffered in his right knee in October. Ohio State defensive end Cam Heyward (elbow surgery) and Iowa defensive tackle Karl Klug (hamstring) are also sitting out.