I doubt he'd do it. There again, I remember him pulling out of a fight with then WBO Featherweight Champion Scott "the drunk" Harrison because he suddenly decided he wanted to move up in weight. I can't really work the guy out. I think Katsidis would beat him anyway.

As far as I'm aware, the fight is still on, just delayed and Guzman is still training using his right hand, so I guess it's legit.