ROCHESTER, NY (WTVB) - The PGA's final major of the year starts today when the best in the world compete at Oak Hill Country Club in Rochester, New York. The season's first three major champions will tee off in a grouping when the PGA Championship begins. Masters titlist Adam Scott will play the first two rounds at Oak Hill with U.S. Open champ Justin Rose and British Open winner Phil Mickelson. Four-time Championship winner Tiger Woods will be looking to win his first major since the 2008 U.S. Open at Torrey Pines. Defending champion Rory McIlroy cruised to a tournament-record eight-stroke victory last year but has struggled so far this season.