Williams is born almost 30 years earlier and is in his prime in the early 1930s and he is the champion rather than Primo Carnera and Baer has to go through him to be champion. Who wins?
I think Baer toughens out the leather Cleve throws at him early and knocks him out at some point in the mid to late rounds.
Baer by KO but there would be some leather thrown while it lasted, and if Max's head is in the clouds he could easily wind up horizontal.