08/08/2010 3:33PM

Del Mar: Jockey changes for Sunday

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Jockey Martin Pedroza will not ride on Sunday because of a pinched nerve in his back, according to track officials. His place on Benecia in the first race has been taken by Kerwin John. In the sixth race, Patrick Valenzuela will ride True Way of Grace.

Paul Atkinson will ride Pedroza's mount in the second, Our Juke Box Hero. Also in the second race, Luis Medina will ride Skimming Skipper.