Margarito dominated Cotto and gave him a beating. That would have boosted his ego and self-confidence.

His next fight was against Mosley who had been beaten by the boxer he just busted. Why would he then use loaded gloves in that fight when he didn't need it before? It just doesn't make sense.

Conclusion: He was already 'dirty' in the Cotto fight.

Cotto vs Margarito II will put them in an even playing field.