Maybe because Norris didn't need surgery Matter of fact, he instantly healed once he went backstage

Norris' injury wasn't an injury its about as legit as Camacho Jr's "I can't see" excuse

Mike's injury was legit.. because he couldn't walk and was wheelchaired around Norris was walking around jumping around and looking at his paycheck. He was looking for a way out after he tasted Mike's power