WGC champ Ian Poulter played Titleist's prototype V1x Plus prototype ball at the Ritz-Carlton GC at Dove Mountain... A splash of color: Tim Clark opted for Srixon's Z-Star Tour Yellow ball at the WGC-Accenture Match Play, winning two matches. Robert Gamez also used the ball at the Mayakoba event...Although Brian Gay changed irons, he hasn't changed his philosophy of splitting the set. At Dove Mountain Gay used Titleist's game-improvement AP1 model for his 4-iron and the company's AP2 for the rest of his irons.