Heat center Shaquille O'Neal will make his debut in a vitaminwater ad during Super Bowl XLII as a ... jockey. Yep, the 7 foot 1, 325-pound O'Neal sports jockey silks and rides a horse in the 60-second spot, which is being kept under wraps until it airs at the beginning of the third quarter of Sunday's game on Fox. In the meantime, check out O'Neal in his silks, courtesy of vitaminwater maker Glaceau.

O'Neal became a vitaminwater endorser and investor last year, appearing on 32-ounce bottles of power-c flavor. He has been wanting to appear in one of the company's off-beat ads. In fact, he came up with the idea for the spot.

"I grew up in Texas, so I'm no stranger to riding horses, but I've always wanted to try being a jockey in an actual horse race - so vitaminwater and I decided to give it a try," O'Neal said in a statement.

It didn't hurt that Glaceau President Mike Repole is among the top 50 race horse owners in the country.

WADE AND BARKLEY

Meanwhile, Heat guard Dwyane Wade and Charles Barkley continue their T-Mobile ad campaign during the Super Bowl. The company is running this teaser ad on YouTube encouraging the public to tune in to find out if Wade will finally make it into Barkley's "Fave 5":