The owner of Kentucky Derby winner Spend a Buck has been negotiating with jockey Chris McCarron, among others, as a possible stand-in for Angel Cordero if Cordero cannot ride the horse in Monday's Jersey Derby, it has been learned.

Cordero, who rode Spend a Buck to victory in the Kentucky Derby, may be unavailable for the race because he had made a previous commitment to ride Track Barron in Monday's Metropolitan Mile at Belmont.

Spend a Buck owner Dennis Diaz, who was not available to comment yesterday, indicated that Cordero told him he must get the permission of Track Barron's owner, Peter Brant, to get out of the commitment. Brant also was unavailable.

The rider who does ride Spend A Buck in the Jersey Derby stands to earn at least 10 percent of the $2 million bonus offered by Garden State to Spend a Buck if he wins the race. Cordero has been on Spend a Buck for six races. If Track Barron wins the Metropolitan Mile, Cordero can earn $15,000.

In the feature at Pimlico today, Apalgaffey circled horses on the turn en route to an easy triumph over pacesetter Esprit Detente.

Apalgaffey was ridden by Greg Hutton, who substituted for Tony Vega.