LOUISVILLE, Ky. (AP) -Calvin Borel is out as the rider of Kentucky Derby winner Mine That Bird.

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The move comes after trainer Chip Woolley, Borel and the jockey's agent could not agree on a long-term commitment.

Borel possibly could have been aboard the gelding for his next scheduled start at the $750,000 West Virginia Derby on Aug. 1. But Woolley said he wants someone committed to ride Mine That Bird the through the Breeders' Cup in Santa Anita, Calif., in November.

``We're going to try to find a rider that can commit to riding Mine That Bird through the season,'' Woolley said Wednesday. ``He has other commitments and an inability to commit to ride my horse.''

Borel's agent, Jerry Hissam, said Borel didn't want to give a multi-race commitment, but would gladly ride Mine That Bird again in the future, given the chance.

``If Mr. Woolley would like to have him back, he'd like to come back,'' Hissam said. ``They have just treated us fabulous.''

Borel rode Mine That Bird to a dramatic come-from-behind win in the Kentucky Derby. Changing mounts in the Preakness, he rode filly Rachel Alexandra to a win against the boys before riding Mine That Bird to a third in the Belmont. Mine That Bird was second in the Preakness.