#2 The Undertaker wrestled Jericho after getting burned
If there was ever a man committed to his craft, it has to be The Undertaker. Just listen to this clip from Talk is Jericho between Chris Jericho and Paul Heyman, if you don't believe us.
Cody Rhodes' uncle is a WWE Hall of Famer. More details HERE.
During a mishap while coming to the ring, The Undertaker was burned in the face and body and was protected only because of his hat and his long mane. Despite the fact that those injuries would have felled a lesser man, The Undertaker went into the ring, finished his match and then, in the backstage area, complained to Vince McMahon about firing the guy who ran the pyro that same night.
The Undertaker's flesh was completely burned, and he later admitted to Jericho that the toughest part, at least for him, was to lay belly-down for the Walls of Jericho. All said and done, there is no tougher WWE soldier.