When did people start referring to Lopez as M. Lo?! Too funny.
Anyway, my bet would be on Lopez. He could crack Mike's head with a cymbal. In all reality, I don't think they'd ever get in a physical fight to begin with.
Also, Mike would probably disintergrate Lopez's head a death growl... but if he survived the initial onslaught, Martin's deadly Mantis Style Kung Fu would shred Mike's puny Tiger Style.