1. [autotag]Donald Cerrone[/autotag]
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Age: 36
Debut: UFC 126 on Feb. 5, 2011
Number of fights: 34
Number of wins: 23
Cerrone had a rapid rise up the UFC’s all-time wins list due largely to his sheer rate of activity. “Cowboy” has competed more than anyone in the organization over the past half-decade, and while the winning results have somewhat slowed in recent years, there’s no end in sight and he’s likely to earn more.