Clowney impresses with a 4.47 on his first try in speed drills.

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Indianapolis, IN (WLTX) - Jadeveon Clowney's speed is not hype: he's fast.

The former South Carolina Gamecock confirmed his elite ability as he ran an unofficial 40 yard dash time of 4.47 seconds on his first try at the NFL Combine Monday. He then followed up with a 4.48 less than a half hour later.

The official time was later announced as 4.53. That official time is usually slower than the unofficial, however, so that's no surprise.

The numbers match up with a report that Clowney ran a 4.45 last year in front of his own coaches at USC.

For some perspective, that's faster than the unofficial times for former USC quarterback Connor Shaw and Texas A&M star Johnny Manziel, who were two of the most mobile and elusive QBs in America. Of course, Clowney's job will be to chase quarterbacks in the pros.

Keep in mind, he's also 6 feet 5 inches tall and weighs 266 pounds.

ESPN's draft expert Todd McShay says Clowney's time is better than the average for wide receivers.

Clowney is one of hundreds of NFL prospects taking part in the multi-day pre-draft event being held in Indianapolis. NFL coaches and scouts are in attendance, evaluating players' performance in a series of skill drills and interviews.

Clowney says he'll go home and spend two or three days with his family, then will get back to preparing for the next NFL event, which is South Carolina's Pro Day on April 2nd.

"I'm excited about it, I'm looking forward to it," he said.

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