Kentucky Derby winner Orb stands as he is cooled down after a workout at Pimlico Race Course in Baltimore, Friday, May 17. The Preakness Stakes horse race is scheduled to take place May 18.

Orb works out in preparation for the upcoming 138th running of the Preakness Stakes at Pimlico Race Course in Baltimore, Maryland, on May 17. The Preakness Stakes, the second leg of U.S. thoroughbred racing's Triple Crown, will be run Saturday.

Orb grazes under the watchful eyes of exercise rider Jennifer Patterson (2nd R) and trainer Shug McGaughey (R) after an early morning workout in preparation for the upcoming 138th running of the Preakness Stakes at Pimlico Race Course in Baltimore, Maryland, on May 17. The Preakness Stakes, the second leg of U.S. thoroughbred racing's Triple Crown, will be run Saturday.

Child jockeys race their horses at a racetrack outside Bima, Indonesia, Nov. 17.

Child jockey Herman Sarifudin is lifted up by his father in the starting gates before a horse race.

Child jockeys sit inside a starting gate before a race.

The foot of child jockey is seen as he sits on his horse at Panda racetrack.

Horses race at Panda racetrack.

Spectators cheer during a race at Panda racetrack.

A child jockey hugs his horse after finishing a race at Panda racetrack.

Endiansyah Mohammad, center, warms up his horse on Kalaki beach.

A boy washes a horse after a race at Kalaki beach outside Bima.

Jockey Jonatan Bartoletti, representing the Valmontone parish, rides to win the Palio race in Siena, Italy, on Aug. 16. Almost without fail since the mid-1600s, ten bareback riders compete twice a year around Siena's shell-shaped central square in a bid to win the Palio, a silk banner depicting the Madonna and child.

Jockey Jonatan Bartoletti of the Valmontone parish rides ahead of jockey Alberto Ricceri of the Selva parish to win the race.

Fans celebrate after Moedi, the horse representing the Valmontone parish, won the Palio race.

Rider Jonatan Bartoletti, also known as Scompiglio, is mobbed by supporters after he won the Palio.

Horses compete during the General Proof on the eve of the Palio horse race, in Siena on August 15. The Palio medieval race is held twice a year in Siena with jockeys riding bareback around a makeshift race course set up in the city's central square.

The horse of Valdimontone parish is escorted by its groom after training session of the Palio race in Siena August 15. Every year on August 16, almost without fail since the mid-1600s, 10 riders compete bareback around Siena's shell-shaped central square in a bid to win the Palio, a silk banner depicting the Madonna and child.

Italian Carabinieri police arrive during their parade prior to a training session of the Palio race in Siena's main square August 15. Every year on August 16, almost without fail since the mid-1600s, 10 riders compete bareback around Siena's shell-shaped central square in a bid to win the Palio, a silk banner depicting the Madonna and child.

An Italian Carabinieri falls off during a parade on the eve of the Palio horse race, in Siena on August 15, 2012. The Palio medieval race is held twice a year in Siena with jockeys riding bareback around a makeshift race course set up in the city's central square.

A view of Del Campo square during a training session of the Palio race in Siena August 15.

A supporter celebrates with the horse after jockey Luigi Bruschelli of the Onda contrada (Wave parish) won the Palio race in Siena, Italy on July 2, 2012.

Jockey Luigi Bruschelli, right, looks back as he wins the race.

Jockey Luigi Bruschelli, right, leads the runners and riders.

Luigi Bruschelli is congratulated after winning the race.

Race-goers sit together at the annual Royal Ascot horse racing event near Windsor, Berkshire on June 19, 2012. The five-day meeting is a highlight of global horse racing and the pinnacle of the English social calendar.

A couple celebrate after their horse came in first on the opening day of the Royal Ascot race.

Racegoers arrive for the first day of racing at Royal Ascot.

Race-goers enjoy a picnic on the first day of the Royal Ascot.

Triple Crown hopeful I'll Have Another is bathed after morning workouts while trainer Doug O'Neill looks on at Belmont Park in Elmont, New York, June 8. I'll Have Another was going to attempt to become the first horse since Affirmed in 1978 to win racing's coveted Triple Crown but was scratched from the race because of injury on Friday morning.

I'll Have Another walks in the barn after a morning workout at Belmont Park, Friday, June 8, 2012 in Elmont, N.Y. The Triple Crown hopeful was scheduled to run Saturday in the Belmont Stakes.

I'll Have Another takes a nip at exercise rider Jonny Garcia at Belmont Park, Friday, June 8, in Elmont, N.Y.

Triple Crown Hopefull I'll Have Another gallops with exercise rider Jonny Garcia up during a morning workout at Belmont Park on June 7, 2012 in Elmont, New York.