Louis had one of the most educated lead hands in heavyweight history. https://www.google.com/search?q=Joe...69i57j69i60.1782j0j7&sourceid=chrome&ie=UTF-8
169lb KO 19% Billy Conn nearly sparked him out despite the fact he was giving away 35lbs to him Timestamped This content is protected Clenelo beats up HWs in the gym who were bigger and hit harder than Louis. Frank Sanchez beat Erislandy Savon in the amateurs, that's the same Savon who was robbed against AJ
It took him 13 rounds to get a 169lb featherfist out of there who was stopped in 3 rounds by an 8-4-3 tomato can
He landed more punches on Conn than Canelo did on Jacobs and Kov, two fighters that Louis would have destroyed.
Just watch Luis vs Marciano compared to Patterson vs Johansson - the gulf in quality between the two fights is massive. Louis and Marciano look like they are fighting underwatter they appear so slow and slugglish and they are so flatfooted their shoes appeared to be glued to the ring. Now this isn't a slight against all pre 60s boxing, just the quality HWs divison pre 60s (e.g Robinson's and Lamotta quality is clear as day on the limited footage).
So even though this supposedly murderous punching deadly accurate HW destroyer landed plenty of his bombs against the 169lb Conn it still took him 13 rounds to get him out of there despite the fact he had a 35lb weight advantage on him and Conn had previously been taken out by a tomato can in 3 rounds?