#7 Melvin Guillard
Originally debuting in the UFC back in 2005 following a run on TUF, it felt like the UFC were waiting for the best part of a decade for Melvin Guillard to live up to his potential, and they gave him a crazy amount of chances to do so.
Unfortunately, ‘The Young Assassin’ simply couldn’t hold up his end of the bargain.
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An initial run of two explosive knockouts was ended in the main event of Fight Night 9 when Joe Stevenson tapped him with a guillotine in just 27 seconds.
But wins over Dennis Siver and Gleison Tibau put him right back into the spotlight, where he was defeated this time by Nate Diaz.
The best run of his UFC career followed – five impressive wins – but that run was quickly curtailed by Joe Lauzon and a rear naked choke.
By this point the pattern had been established; Guillard was insanely powerful and quick on the feet, but his ground game wildly lagged behind the rest of his skill set and consistently let him down.
But the UFC continued to push him as a possible title contender, right until a final slide in 2014 saw him released.
Over his nine-year UFC tenure, Guillard appeared in seven main events or co-main events despite ending his time in the promotion with a spotty record of 12-9. He was a solid fighter in his prime but was never as good as the UFC thought he was or pushed him as being.