"Lightning" Bolt is back. And this time he enters the Olympics as the hunted, not the hunter.

In 2008, Usain Bolt, a relative unknown, took the Olympic stage and wowed fans with three fantastic performances, in the 100-meter dash, the 200 and the 4x100-meter relay.

Bolt won three gold medals in Beijing and looks for another three in London, which would make him the best sprinter—ever.

But recent poor results—he lost both the 100 and 200 to Yohan Blake at the Jamaican trials—have some people doubting whether Bolt can defend his title as the fastest man alive.

So, will Bolt win again? And who is his biggest competition in London?

Bleacher Report Contributor Ryan O'Leary is here with the preview and prediction.

Like this video? Watch more of Bleacher Report's London coverage:

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Bleacher Report will be covering the 2012 London Olympics from every angle throughout the Olympiad, so stay tuned to BleacherReport.com and Bleacher Report's YouTube Channel for all of your coverage.