15 rounds at middleweight. The "Raging Bull vs. The "Body Snatcher".... Maybe a B movie gets made about this match-up(?):yep Who and why?
Hrd to say , I rate McCallum as maybe the best light-middle ever (or Hearns) , so crafty he was. LaMotta , though shorter would have natural weight advantage. This could be a classic , I think McCallum would pull it off in the hardest fight of his career.
I think LaMotta would be a tad too slow for McCallum, his reflexes weren't all that. Mike takes this over decision, pure hard graft, I can't see no other outcome.
When I saw this match-up, I thought of McCallum's fight with Tiozzo for some reason. I really think this one would be somewhat similar. Think McCallum vs Tiozzo with more athletic fighters, and a diffenrent winner. McCallum by very hard fought, but comfortable decision.