As it does say. If Prime James J was in there with The "Smoke ', could Joe stop him? Unless you think Jeff beats Frazier.. Then the question is moot..
Interesting match up. I don't see Jeffries as being able to handle a pressure fighter like Frazier. Jeffries is tough and may go the distance in a 15 round fight, but Joe is the clear winner.
I think Frazier would outpoint Jeffries, but he wouldn't stop him. People mention Chuvalo, but Jeffries was far better fighter and more skilled clincher.
It's not quite London Prize Ring Rules era; more like Queensberry with a blind eye to roughhousing in the clinch. So small gloves and plenty of mauling and clinch wrestling. The older guys trained with Greco-Roman wrestlers to improve clinch work. Kitchen vs Papke, for example, looks like a wrestling bout where the wrestlers occasionally punch each other
That said, I don't think they were throwing each other, so Joe would be in better shape than against somebody from the era immediately beforehand. Or worse, against Jeffries under Prize Ring Rules. EDIT: It was absolutely awful to watch, by the way. Maybe it was more interesting in person, but holy crap, 25 rounds of grainy clinch mauling is excruciating.
Joe is a great fighter, but he'd need to be a sorcerer. Also, I admit I've never actually forced myself to watch 25 consecutive rounds of old grainy footage. So I imagine this would be even worse.
I can't see anybody enduring what Frazier could dish out on durability alone, if that is what is being asked. I am not saying that Jeffries couldn't win, but I don't think that he could win that way.
I make Jeff the favorite under the rules of his era. I can really see Jeff tying up Frazier and roughing him up in the clinch. If you see Jack Johnson, he likes to twist the arms of his opponent in the clinch, If you felt Lewis leaning on his foes during the clinch was bad, than you have not seen anything with these late 1800's-early 1900's fighters.