Dishonorable mention War Machine beating up 6 bouncers at a porn party.
Honorable mentions Huerta beating some thug into a pavement who was hitting a girl, Jones chasing down and smashing a purse snatcher.
Also to the OP like others said, the first was a boxing coach not joe street. The Krazy Horse beating Wandy story has been confirmed to be "horseshit", in fact there's video of Krazy Horse being choked out by Wandy's teammate not the other way round. Murray was a badass trained pro himself with championship potential. Frye fell over drunk.
Elite MMA fighters don't get beat up by "Street fighters" period. Not 1, not 10. Not unless there's knives or guns involved.