By Brian Wacker, PGATOUR.COM BETHESDA, Md. ? Hunter Mahan was standing on the 18th green at Congressional when he told his caddie, John Wood, ?For 2 1/2 hours of golf if 90 percent of the field is over par, you know it?s playing tough.? Mahan should know. He hit ?great? and managed just a 1-under [...] More...