Frank Mir putting on 20lbs. + of muscle isn't gonna change shit. Frank don't know how to move around and actually utilize all of that mass, it'll probably just slow him down. Guys like Carwin and Brock actually know how to make that size work for them since they've carried it for so many years.
I think Brock would make Frank Mir's face look like hamburger meat for the 3rd time, even in Mir's win he looked like a loser.