Temecula Creek, who began the year running for a $7,500 claiming tag and improved enough to get a small piece of the purse in the Grade 1 Vosburgh two months ago, and Gattopardo, a one-time Triple Crown prospect who resumed racing this fall after 2 1/2 years on the sidelines, head a field of eight older sprinters in Tuesday’s $75,000 Valley Forge Stakes at Parx Racing.