Baseball: Mark Prior using steroids?

Mark Prior was shocked by Jack McDowell's accusations that the Chicago Cubs pitcher has used steroids and that is the reason his strained Achilles tendon is not healing. McDowell, a Cy Young winner who pitched for the Chicago White Sox, New York Yankees, Cleveland Indians and Anaheim Angels from 1987-99, told Sporting News Radio and the Chicago Sun-Times that Prior's slow recovery is a sign of steroid use.