10/27/2003 1:00AM

Meet to end with a bang


SAN MATEO, Calif. - Bay Meadows heads into the final week of its fall season and ends with what could be one of the most interesting races of the meeting.

The Grade 3 Bay Meadows Derby will be run Saturday with eight 3-year-olds considered likely starters, including 119-pound highweight Urban King, winless but stakes-placed in five stakes for trainer Bobby Frankel. Also expected to run are two Neil Drysdale-trained horses, Mediator and Right Proof, both of whom will carry 115 pounds.

Winning Stripes may be the lone locally based entrant in the $100,000 race at 1 1/8 miles on the turf. Mediator's only two starts, both victories, were over the turf here, as Drysdale sent him north for his debut and brought him back for a first-level allowance race.

Sigint, Stanley Park, Kewen, and Eyad also are likely to run.

Lumpkins, Radke injured

Jason Lumpkins and Kevin Radke both had to take off their mounts Sunday after separate incidents in the fourth race, a six-furlong sprint for 2-year-old maiden fillies.

Lumpkins was injured in the paddock when Bellarama ducked badly just as Lumpkins was mounting. He was thrown and got his right foot caught in her reins. As Lumpkins fell, Bellarama spooked and appeared to step on Lumpkins's leg near his knee. Trainer Jedd Josephson did a good job of restraining the filly.

Lumpkins, who was scheduled to return home to Kentucky after the races because of pending surgery for his wife, suffered a strained a muscle behind the knee and some bruises.

Bellarama ran fourth in the race under Joe Castro.

Radke was injured before the race when Sexy Helmsman flipped in the gate. He was able to walk back into the jockeys' room and his injuries were thought to be not serious.

Brook shoots for 3 for 3

In Wednesday's co-feature, trainer Joe Brook, who has been running horses here since 1957, will put his perfect record at the meet on the line with Chapilkim in a $32,000 claimer for fillies and mares at five furlongs on the turf. He has started two runners at the meet, and both won.

Brook has only four horses in his barn as he recovers from lymphoma, for which he was hospitalized earlier this year.

Chapilkim won for a $12,500 tag on Sept. 25 and looks tough as a pace factor despite the raise.

"I bought her at a yearling sale in Kentucky," Brook said. "I got her because she was a tiny filly. I liked her conformation. She's a pretty nicely bred filly out of a French mare."

Chapilkim was claimed from Brook for $6,250 on Feb. 27. He re-claimed her for $12,500 five months later at Santa Rosa.

"She's got a little ability, and, when you have four horses, they become part of your family," Brook said.

Pace makes race

The axiom that pace makes the race was evident in a pair of turf races Sunday when Marty's Zee won an $80,000 optional claimer and Vallarta captured the Pacifica Handicap. Marty's Zee's race was at one mile and Vallarta's at 1 1/16 miles.

Although there seemed to be a lot of speed in her race, Marty's Zee grabbed the lead in the mile race under Castro and got away with extremely slow early fractions of 24.50 and 49.46 seconds. She held off Lacrystal Classic to win by a half-length.

Roberto Gonzalez did the same thing with Vallarta in the paceless Pacifica. He had an open lead and was never challenged, running quarters of 24.10, 23.91, 23.89, and 23.93 in winning the 1 1/16-mile race by three lengths over favored Ninebanks, who was compromised by the pace.

"When I saw the 48, I thought we had a real good shot," winning trainer Donna Elordi said.

The stakes victory was the second in two weeks for Elordi, who also saddled Pheiffer to win the Charles H. Russell Handicap on Oct. 12.

"It's amazing," Elordi said. "You can go so long and not have much stock, and now this."