Won regularly for the Jaspers, medaling at all the top races in the East, including the Metropolitans, Penn Relays, IC4As, and Millrose Games. Traditionally the leadoff runner, Bill would often clock a 49-second leg for the mile relay and 1:54 for his half-mile leg of the two-mile relay. At the prestigious Millrose Games alone, he took two golds and one silver. While running for the New York Athletic Club in 1960, he and his team won the coveted National Amateur Athletic Union Distance Medley Relay Championship of America, taking the bronze in the one-mile relay at the same event. After being offered a sports physician job with the New York Football Giants, the University of Wisconsin recruited Clancy to develop a sports medicine program. While there, he invented the procedure for reconstructing the anterior cruciate ligament (ACL and posterior cruciate ligament in the knee. Now known as the “Clancy Procedure,” ACL surgery has been performed on countless patients around the world and earned Bill a place in the American Orthopedic Society for Sports Medicine (AOSSM) Hall of Fame.