Too many What Ifs...
Tyson beats pre- Manny Lennox Lewis easily, without setbacks Tyson would be a serious threat into the late 90's, how much would be dependent upon age, wear/tear and # of tough fights.
Lewis and Tyson sparred in Catskill as teenagers. Atlas said Lennox was just wrong for Mike.Tyson would have beaten Lewis if they met in the early 90s. It would have been a boring decision with Lewis just trying to avoid getting KOed.