NEW YORK (Reuters) - Exciting American talent Patrick Cantlay will receive the 2011 Mark H. McCormack Medal in honor of his status as the world's number one amateur, the Royal & Ancient said Monday. The 19-year-old, who also made a significant impact on the PGA Tour this season, cemented his place at the top of the rankings by finishing runner-up to compatriot Kelly Kraft at the U.S.