Saratoga Day 17. TODD PLETCHER’S FEMALE EXERCISE RIDERS. Exercise rider Valerie Buck gives horse Ready For May a kiss at Todd Pletcher’s Stable on the Oklahoma track. Valerie Buck, 40, began her career as a hotwalker at Philadelphia Park in 1983 and has worked for numerous trainers over the years working in Florida, Kentucky, California, New York, New Jersey and Pennsylvania. When asked about exercising Belmont Stakes winner Rags to Riches, Valerie describes the chestnut filly as giving her “goosebumps all over”.