Richard Petty Motorsports insisted Wednesday it is committed to running two cars in 2015 despite losing driver Marcos Ambrose and primary sponsor Stanley in the span of five days. Ambrose said last weekend he is returning to his native Australia and will run V8 Supercars for Roger Penske. His sponsor, Stanley, said Wednesday it is moving to Joe Gibbs Racing to sponsor Carl Edwards for 12 races. Stanley brand DeWalt will sponsor Matt Kenseth for six races. More...