Vargas is a joke making this fight at 168. If he wants to fight at 168 fight a legit 168 pound fighter. I hope Mayorga tears his head off.
I think it is a combination of injuries, age and a lack of discipline. It would be unfair to say it is just one thing.
Probably the same as all the fighters that lost to Oscar thought. "How the hell could I let this ***gy bi-sexual beat me? I hope his tampon falls on the mat next time he fights."