Three-year-old Squirtle Squirt is on top of his game at the moment but to remain there he must hold off a talented pack of veteran sprinters in Saturday's grade I $300,000 Vosburgh Stakes at Belmont Park. The Vosburgh is one of four stakes on Saturday's 11-race program, which also includes the grade II Jerome Handicap, the grade III Noble Damsel and the Ashley Cole.Squirtle Squirt, the speed of the Vosburgh field, will have his work cut out for him as he challenges older runners. In his only other start against older competition, the son of Marquetry vied for the lead with Explicit in Hollywood's Triple Bend Breeders' Cup and was caught late by 4-year-old Ceeband, a 44-1 longshot. Challenging Squirtle Squirt will be the Michael Tabor entry of Left Bank and Yonaguska. Like Squirtle Squirt, Yonaguska will carry 123 pounds, getting a three-pound spot from the older horses under the weight-for-age conditions of the Vosburgh. Left Bank finished second in the grade I Forego, beaten a 1 1/4 lengths after running in heavy traffic through the stretch. Yonaguska has not raced since finishing third in the Lafayette at Keeneland in April. The field for the $300,000 Vosburgh includes: Big E E (Richard Migliore, 126); Sly Ole Buck (Norberto Arrooyo, Jr., 126); Squirtle Squirt (Jerry Bailey, 123); Peeping Tom (Shaun Bridgmohan, 126); Say Florida Sandy (Aaron Gryder, 126); Alannan (Edgar Prado, 126); Left Bank (John Velazquez, 126); and Yonaguska (Mike Smith, 123).