08/31/2005 12:00AM

14 races - nothing but 2-year-olds

In Summation is tops among local juveniles.

MIAMI - Fans of racing for 2-year-olds will be hard pressed to find a more attractive program than Saturday's Juvenile Showcase at Calder, a 14-race card consisting exclusively of 2-year-old races.

The unique Labor Day weekend program will be highlighted by the middle legs of the Florida Stallion Stakes, the $125,000 Affirmed Stakes and its filly counterpart, the $125,000 Susan's Girl Stakes. Both races will be run at seven furlongs.

The Juvenile Showcase includes four other stakes, two on grass and two at a mile. There will also be five maiden special weight races, two of which are on the turf.

The Affirmed and Susan's Girl will mark the returns of In Summation and Running Lass, respectively, each of whom was an easy winners of one of the opening legs of the series three weeks earlier and will be heavily favored to win again on Saturday.

In Summation is the undisputed leader among the local 2-year-olds, having won four races in as many starts, including his six-length tour de force in the six-furlong Dr. Fager Stakes, which earned him a 100 Beyer Speed Figure. In Summation, who worked five furlongs in 1:01.20 on Tuesday, will compete in a field that also includes impressive maiden winners Blazing Rate and Lucky Chief as well as the much improved Thanks Dubya.

Running Lass has won 3 of 5 starts, including the six-furlong Desert Vixen Stakes by 7 1/4 lengths. She will face virtually the same competition in the Susan's Girl, which attracted one shipper, the Boston-based Zooming By.

Plesa barn gets busy

Trainer Eddie Plesa Jr., who will send out Lucky Chief and D.J. Best in the Affirmed, said that B.B. Best might be feeling the effects of the heat and humidity that has plagued this area much of the summer.

Plesa scratched B.B. Best out of the American Dreamer Stakes on Aug. 21. The American Dreamer would have been the first start for the Grade 1 stakes-placed 3-year-old B.B. Best since last spring.

"He spiked a high temperature the Thursday before the race," Plesa said. "I think the heat got to him. He's 100 percent now, but I'm going to be cautious with him for the time being because of the heat. I have nothing picked out for him at the moment."

B.B. Best won two-thirds of the open division of the Stallion Stakes last year. His only defeat came on Juvenile Showcase Day, a third-place finish in the Affirmed Stakes.

Plesa will send out another of his promising 3-year-olds, Qureall, as a heavy favorite in Friday's featured eighth race. Qureall, a son of Yet It's True, will make his first start in the second-level allowance dash since finishing second behind Lost in the Fog in the Grade 2 Carry Back Stakes.

Qureall will face his sternest challenges from Kin's Hurrah, a much improved 3-year-old coming off a pair of easy wins, and Get Wild, a former stakes runner who has been idle since being claimed for $40,000 at Gulfstream Park on Jan. 15.

Back-to-back first-time winners

Apprentice jockeys Cesar Garcia and Alexis Freites each rode the first winner of his career within 30 minutes of one another here on Sunday, combining for a $448.20 late daily double payoff.

Both Freites, 29, and Garcia, 22, are natives of Caracus, Venezuela. Freites was the first to get his maiden victory, guiding home 29-1 Good O Bunny to win Sunday's 10th race. Garcia won the next race, aboard 9-1 first-time starter Formal Patrol for trainer Tim Ritvo.

Freites, who holds a college degree in business administration, worked in a bank in Venezuela before quitting five years ago to become a jockey. He has ridden in 50 races, all but five in Venezuela.

Garcia has ridden 30 races, the majority of them since arriving at Calder.

* Southern Cal, riding a three-race win streak, was assigned high weight of 119 pounds for Monday's $150,000 Miami Mile Breeders' Cup Handicap. The one-mile turf race attracted 17 nominees, including Old Deuteronomy, runner-up in Arlington Park's Sea of Erin Breeders' Cup Handicap on Aug. 6, and multiple turf stakes winner Gin and Sin. Both horses would carry 116 pounds if they ship in for the race.