"The subplot was taking shape, and Galento did his part in the ring as well. From the summer of 1937 to the fall of 1939, Galento went undefeated, knocking out all eleven opponents. His big break was an eighth round kayo of Philadelphia's Al Ettore, the ninth rated heavyweight at the time. That win, bolstered by kayos of former title challengers Harry Thomas and Nathan Mann, turned Galento into a top ten heavyweight. Knocking out comedian Jackie Gleason, who unknowingly challenged the fat heckler, did not improve Galento's ratings."
I remember reading something about this.I think he was the only one to get Gleason, but Gleason mentioned that Joe Louis once mentioned that he was hit the hardest by Tony, or something to that degree.