Pryor had the best work ethic of all sparing up to 45 rounds a day (read this in a boxing magazine). I would have given him a good chance against Duran, Leonard or Hears. In fact He beat Hearns handily in the Golden gloves and I think the Olympic trials. I have read that In sparing he and Leonard beat the heck out of each other with Leonard being dropped on occasion. Pryor challenged Leonard on several occasions and was finally offered 500,000 to Leonard's $4 million and thus these unfair negotiations brought on the down-fall of what could have been a great fight.