Jack is too quick and powerful. I see a war with marvin finishing on his feet but dropping a decision.
Joke thread ? This one was done a while back... http://www.eastsideboxing.com/forum/showthread.php?t=375935 and included the following from Seamus: I think we can safely say the same about Dempsey vs Hagler.
Dempsey couldn't KO a 169lb Gibbons, I'd pick him to win based on size and strength but Hagler's jab and speed could keep him competitive Hagler is quicker than Dempsey and Dempsey doesn't have a jab either
Either way hagler won't be able to use the speed to his advantage because jack is too quick for a mw to have a fighting chance against him. He never stops marvin but he should hurt him and take a point win.