Pentelicus, whose 24 juvenile winners were the most for any stallion in 1997, was euthanized Aug. 29 after foundering. The 18-year-old son of Fappiano had stood his entire career at J. Michael O'Farrell's Ocala Stud Farm near Ocala, Fla."He developed laminitis in early August," O'Farrell said. "It stabilized for about two or three weeks, but then it didn't respond to treatment."Ocala Stud bought Pentelicus for stallion duty from Mr. and Mrs. James Binger's Tartan Farms. A sprinter by profession, Pentelicus won 11 of 37 races and earned $267,742 racing as a Tartan homebred. He was a stakes winner three separate years and set a track record of 1:14 1/5 for 6 1/2 furlongs at Arlington.Pentelicus, who was produced from the In Reality mare Charedi, sired 16 stakes winners and the earners of $16.7 million. His runners included graded winners Penny Blues, How About Now, Hair Spray, and Dontletthebigonego.Pentelicus' hafl-sister, Gana Facil, produced Kentucky Derby (gr. I) winner and champion Unbridled.