I really think Erik can still fight at 135lbs. But at this stage of his career, he should pick his opponents carefully. He should start with an easy tune-up and then perhaps fight one of the better fighters there. He should avoid guys like Casamayor unless he is sure he has a chance. I think a good match-up would be Barrios. Barrios in his fight against Guzman showed that he is a wild-swinging, styless slugger which I think perfectly matches Erik's style. If he is careful, he can stay undefeated for the rest of his career.