Lol dat gif
A Jon Fitch fight against someone with a very defensive guard and good cardio could go 10-15 rounds.
The Royce vs Sakuraba fight was dull as dishwater. So I imagine interest would lower.
To answer the question I think the Diazs especially Nick could get a belt. Just boxing and walking folk down for hours
Mighty Mouse would fight for days without rest like a fucking spartan.
Against 2 hw's at the same time running off the cage and shit.Vs who?
Barely needs 25 mins lately.
Ive never fast forwarded a fight i had not seen except that one.
DJ vs Cruz would probably go on until a meteorite kills all life on earth