The field of horses breaks from the starting gates during the Kentucky Derby Saturday.

Mario Gutierrez aboard Nyquist passes Florent Geroux aboard Gun Runner during the Kentucky Derby at Churchill Downs.

Jockeys keep their horses in a tight pack as they round an early turn in Saturday's Kentucky Derby. The Associated Press

Mario Guitierrez rides Nyquist to victory during the 142nd running of the Kentucky Derby Saturday in Louisville, Ky. Nyquist, named for NHL player Gustav Nyquist, gives owner J. Paul Reddam, trainer Doug O'Neill and jockey Gutierrez their second Derby winner. I'll Have Another won the Derby and Preakness in 2012. The Associated Press

Mario Guitierrez rides Nyquist across the finish line 1¼ lengths ahead of Exaggerator during the Kentucky Derby. The Associated Press

Mario Gutierrez aboard Nyquist reacts after winning the 142nd running of the Kentucky Derby at Churchill Downs.

Mario Guitierrez celebrates after riding Nyquist to victory Saturday at the Kentucky Derby. The Associated Press

Storm clouds form in the hours before the Kentucky Derby. The Associated Press

About 1½ hours before the start of the Derby, the wind began gusting and sheets of rain fell as the crowd tried to run for cover. The rain let up after about 10 minutes, and the sun came out in time for the race. The Associated Press

Fans enjoy the party on the infield before the Kentucky Derby.

One of the custom-made hats worn by hundreds of well-heeled patrons at Churchill Downs Saturday. The Associated Press

Inventive headgear like this – part hat and part art – is a Derby tradition. The Associated Press

Mario Gutierrez aboard Nyquist is presented with the winner's garland at Churchill Downs Saturday.

Nyquist jockey Mario Gutierrez sprays owner J. Paul Reddam with champagne in the winner's circle after the Kentucky Derby at Churchill Downs.