Photos:: Running of the 141st Kentucky Derby

Jockey Victory Espinoza guides American Pharoah wide out of the final turn Saturday during the 141st Kentucky Derby at Churchill Downs in Louisville, Ky.

Jockey Victor Espinoza asks American Pharoah to charge out of the final turn during the 141st Kentucky Derby.

American Pharoah, Firing Line and Dortmund, from left, race down the final stretch during the 141st Kentucky Derby.

Jockey Victory Espinoza guides American Pharoah to the finish line ahead of Firing Line, right, and Dortmund, center, in the 141st Kentucky Derby.

American Pharoah, with jockey Victor Espinoza aboard, wins the 141st Kentucky Derby by a length over Firing Line and jockey Gary Stevens.

Jockey Victor Espinoza celebrates as he guides American Pharoah to victory in the 141st Kentucky Derby on Saturday at Churchill Downs.   (Rob Carr / Getty Images)

Jockey Victor Espinoza acknowledges the cheers after winning the 141st Kentucky Derby aboard American Pharoah.

Jockey Victor Espinoza celebrates aboard American Pharoah after winning the 141st Kentucky Derby.

Trainer Bob Baffert, left, and owner Ahmed Zayat celebrate in the Winner’s Circle after American Pharoah captured the 141st Kentucky Derby.