Martin Kaymer: In 2010, Kaymer won the PGA Championship at Whistling Straits. In 2011, he ascended to the top spot in the Official World Golf Ranking. But by the end of 2012, he may have needed to present proper ID in order to be let through tournament gates. After a T-44 at the Masters, Kaymer managed a T-15 at the U.S. Open, but he didn't come close to making it to the weekend at either the British Open or the PGA. While this went largely unnoticed, unfortunately for the German, there was nowhere to hide in Kiawah (left) when he was part of the marquee pairing with Tiger Woods and Keegan Bradley the first two days. While on his way to a pair of 79s, some fans may have wondered, "Who is that nice club pro helping to tend the flagstick?"