Mr. and Mrs. Jerome Moss' Stanley Park surged past favored Bis Repetitas near the eighth pole and swept to an easy 2 1/2-length victory in the $100,000 Bay Meadows Derby (gr. IIIT) Saturday.The Southern California shipper, ridden by Eric Saint-Martin for trainer John Shirreffs, won his first stakes race in 1:48 4/5 for the nine furlongs on a firm course.Kewen was third, 3 3/4 lengths behind the winner while 1 1/4 length clear of fourth-place Sigint in the eight-horse field.Saint-Martin had Stanley Park in hand on the inside toward the rear of the field down the backstretch, gradually easing the chestnut colt by Swain out while gaining on the leaders. He swept up around most of the front pack while four-wide coming into the turn and continued forwardly until collaring Bis Repetitas and driving home handily.Jose Valdivia Jr. had Bis Repetitas three wide while tracking the pace of Eyad through fractions of :23, :48 and 1:11. Bis Repetitas engaged Kewen and Rusell Baze, who had inherited the lead from Eyad, and took over briefly until Stanley Park swept past them both.Stanley Park, a $240,000 Keeneland September 2001 yearling buy, earned $55,000 for his third win in seven starts, pushing his career total to $123,316. Fred Seitz bred the winner, who was produced by the Storm Bird mare Tricky Bird, in Kentucky.The 7-1 fourth choice paid $16.80, $6.60 and $3.60. Bis Repetitas returned $3.80 and $2.80. Kewen's show was $3. The $2 exacta was worth $55.