Jones defends his WBA HW strap against tyson who wins? Jones in shape as always. Tyson in the best shape he could get in at 37 and with a good mentality(whcichhe didnt have at this point but lets assume he somehow rediscovered his love for the sport)
Although Jones showed 0 signs of any punch resistance problems before getting KTFO too close together and he took a few decent shots from ruiz but if tyson was motivated and came in under 230, in shape could probably still stop him at any point in the fight. Tyson still had the power to literally lift williams off the floor with a left uppercut in round 1. Williams later said tyson hit so much harder than Klitschko that it wasnt even a comparison but that he wasnt consistent. He would have to be consistent to maximize his chances of catching jones.