Antonio Margarito co-feature bout on Pacquiao undercard

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Now what... will Mayweather challenge Mosley in order to steal the spotlight away from Manny?

Not will, he must. Everyone (including Mayweather himself) knows he only has a few good fights left before he retires. If Mayweather passes off this opportunity against Mosley, his career/ resume are going to look awful compared to Pacquiao's achievements.

If Pacquiao beats Clottey, there's no way Mayweather can demand 50/50 from him again unless Mayweather beats Mosley.