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"Sugar" Shane Mosley

Power 100 rank: 93
Sport: WBA welterweight boxer
Age: 38
Most recent notable achievement: WBA Welterweight Super Champion in 2009
Earnings: $2.6 million
Key sponsors: NA

Why he's on the list: Believed to be too old to win his lone 2009 bout, Mosley bucked conventional wisdom and knocked out Antonio Margarito to regain the welterweight title.