Photo taken on August 17, 2008 shows US swimmer and all-time Olympian Michael Phelps poses exclusively for the Aug. 25, 2008 edition of Sports Illustrated in this photograph taken in Beijing, China on Aug. 17, 2008. This photo of Phelps, 23, posing with his eight medal collection, the richest gold medal haul ever from a single Olympic Games, marks Phelps' fifth appearance on the cover of Sports Illustrated. Phelps has more SI covers than any other swimmer including Mark Spitz, who is second with three. The August 25, 2008 issue of Sports Illustrated will go on sale on Wednesday. [Xinhua]