alot of them do and many of them underuse it because they wanna scrap. Joe Frazier, even though he had a deformed elbow, had a pretty good jab that he rarely used. The aformentioned Tyson, he had a fine jab, fast, hard and he knew a secret; "it's all timing". But even he would abandon the jab and just bomb away. In the pinklon fight he was instructed to jab and when rooney thought he'd seen enough he told him to start taking him out. Jake Lamotta had a real good jab, he jabbed well with robinson. For a shorter guy, oftentimes, the jab is just used to disquise other things, tyson feinted well with his jab while he'd step in and throw power punches.
