ST. SIMONS ISLAND, Ga. -- His lead was gone two holes ago but Michael Thompson has gone birdie-birdie while final-groupmate Billy Horschel has went bogey-triple and Thompson now has a two-shot lead at Sea Island. Horschel, with two birdies on his first three holes, had taken a one-shot lead at 14 under. But he has since given the four shots back and fallen into a seven-way tie for fourth. Thompson is at 15 under after five holes, putting him two shots clear of Webb Simpson, who has completed six in his final round. 2010 British Open champion Louis Oosthuizen checks in at No. 3, four shots back.