Which Heavyweight who stopped/ko'd/tko'd the highest number of fighters who previously hadn't been stopped before? The fighters tko'd must have had atleast 20 fights. Ali comes to mind first. He was the first (and only) one to stop Foreman and Bonavena. He was also the first to stop Liston and Ron Lyle. Not bad for a supposedly light hitter. Joe Louis stopped the iron chinned Max Baer, Paulino Uzcudun, neither of whom had been stopped before. I don't want to count Conn and JHL because even though they were greats, they were natural light heavies. I wonder who holds the record