ST. SIMONS ISLAND, Ga. -- Billy Horschel found the water hazard left of the 16th fairway and went on to double bogey the 407-yard par-4, knocking him from the lead of the McGladrey Classic. Michael Thompson, who converted his seventh consecutive par on No. 16, remains at 13 under and assumes a one-shot lead. Trevor Immelman (-11/F) and Webb Simpson (-11/17) are now two shots off the pace.