Rosario and Orb stand in the Churchill Downs winner's circle after winning the 139th running of the Kentucky Derby on Saturday, May 4, 2013, in Louisville, Kentucky.
139th Kentucky Derby —
Rosario and Orb stand in the Churchill Downs winner's circle after winning the 139th running of the Kentucky Derby on Saturday, May 4, 2013, in Louisville, Kentucky.
Rob Carr/Getty Images
Jockey Joel Rosario celebrates Orb's victory.
139th Kentucky Derby —
Jockey Joel Rosario celebrates Orb's victory.
Rob Carr/Getty Images
Rosario holds the trophy over his head as he celebrates the victory.
139th Kentucky Derby —
Rosario holds the trophy over his head as he celebrates the victory.
Rob Carr/Getty Images
Rosario rejoices atop a mud-splattered Orb after winning the race.
139th Kentucky Derby —
Rosario rejoices atop a mud-splattered Orb after winning the race.
Andy Lyons/Getty Images
Rosario, right, is congratulated by Robby Albarado, who rode runner-up Golden Soul.
139th Kentucky Derby —
Rosario, right, is congratulated by Robby Albarado, who rode runner-up Golden Soul.
Jamie Squire/Getty Images
The horses enter the home stretch in front of more than 150,000 fans at Churchill Downs.
139th Kentucky Derby —
The horses enter the home stretch in front of more than 150,000 fans at Churchill Downs.
Rob Carr/Getty Images
Joel Rosario and Orb on their way to winning the derby.
139th Kentucky Derby —
Joel Rosario and Orb on their way to winning the derby.
Travis Lindquist/Getty Images
Rosario and Orb take the lead on the straightaway.
139th Kentucky Derby —
Rosario and Orb take the lead on the straightaway.
Rob Carr/Getty Images
Orb takes over the lead on the home stretch en route to victory.
139th Kentucky Derby —
Orb takes over the lead on the home stretch en route to victory.
Matthew Stockman/Getty Images
Rosario and Orb pass in front of Churchill Downs' signature steeples.
139th Kentucky Derby —
Rosario and Orb pass in front of Churchill Downs' signature steeples.
Rob Carr/Getty Images
Joel Rosario riding Orb, center, comes down the final stretch.
139th Kentucky Derby —
Joel Rosario riding Orb, center, comes down the final stretch.
And they're off!
139th Kentucky Derby —
And they're off!
Doug Pensinger/Getty Images
The horses burst through the gate at the start of the Kentucky Derby.
139th Kentucky Derby —
The horses burst through the gate at the start of the Kentucky Derby.
Doug Pensinger/Getty Images
Race fans in festive hats look over the paddock.
139th Kentucky Derby —
Race fans in festive hats look over the paddock.
Michael Heiman/Getty Images
Kevin Krigger, riding Goldencents, takes part in the post parade before the race.
139th Kentucky Derby —
Kevin Krigger, riding Goldencents, takes part in the post parade before the race.
Race fans look out over the crowd.
139th Kentucky Derby —
Race fans look out over the crowd.
Michael Heiman/Getty Images
Rosie Napravnik rides Mylute in the post parade.
139th Kentucky Derby —
Rosie Napravnik rides Mylute in the post parade.
Andy Lyons/Getty Images
Race fans brave the wet weather as they enjoy the festivities prior to the race.
139th Kentucky Derby —
Race fans brave the wet weather as they enjoy the festivities prior to the race.
Andy Lyons/Getty Images
Country singer Martina McBride performs the national anthem prior to the race.
139th Kentucky Derby —
Country singer Martina McBride performs the national anthem prior to the race.
Rob Carr/Getty Images
Fans decide that the muddy infield is the perfect place to practice thier sliding skills.
139th Kentucky Derby —
Fans decide that the muddy infield is the perfect place to practice thier sliding skills.
stringer/getty images
The inclement weather has left plenty of space on the bleachers prior to the race.
139th Kentucky Derby —
The inclement weather has left plenty of space on the bleachers prior to the race.
Doug Pensinger/Getty Images
Those searching for blue skies may have to settle for this patron's hat.
139th Kentucky Derby —
Those searching for blue skies may have to settle for this patron's hat.
Rob Carr/Getty Images
The gloomy weather did not deter many from wearing the vibrantly colored and stylish hats that are a hallmark of the event.
139th Kentucky Derby —
The gloomy weather did not deter many from wearing the vibrantly colored and stylish hats that are a hallmark of the event.
Jamey Price/Getty Images
Security personnel check fans entering Churchill Downs. The Kentucky Derby is the largest U.S. sporting event since the April 15 bombings at the Boston Marathon.
139th Kentucky Derby —
Security personnel check fans entering Churchill Downs. The Kentucky Derby is the largest U.S. sporting event since the April 15 bombings at the Boston Marathon.
Jamey Price/Getty Images
A race fan dons a plastic poncho to ward off the rain.
139th Kentucky Derby —
A race fan dons a plastic poncho to ward off the rain.
Jamey Price/Getty Images
The wet weather made for a perfect excuse to break out a Slip-N-Slide on the infield.
139th Kentucky Derby —
The wet weather made for a perfect excuse to break out a Slip-N-Slide on the infield.
Jamey Price/Getty Images
Plastic rain slickers mute the fashions of Derby attendees.
139th Kentucky Derby —
Plastic rain slickers mute the fashions of Derby attendees.
Andy Lyons/Getty Images
Derby hats are swathed in plastic to keep out the wet.
139th Kentucky Derby —
Derby hats are swathed in plastic to keep out the wet.
Andy Lyons/Getty Images
The weather didn't serve to dampen the flamboyance of many attendees.
139th Kentucky Derby —
The weather didn't serve to dampen the flamboyance of many attendees.
Andy Lyons/Getty Images
A fan's wide-brimmed hat protects her cigar from the rain.
139th Kentucky Derby —
A fan's wide-brimmed hat protects her cigar from the rain.
Andy Lyons/Getty Images