Irishman Harrington took the place of British Open winner Phil Mickelson , who withdrew from the event due to a scheduling conflict . Adam Scott wins the PGA Grand Slam of Golf . The tournament pits the year 's four major winners against each other . World No . 2 Scott beat of competition from U.S. Open champion Justin Rose . - : In a rematch between Tiger Woods and Rory McIlroy, they both win their respective majors for the first time since 2008.
Adam Scott wins the PGA Grand Slam of Golf . The tournament pits the year 's four major winners against each other . World No . 2 Scott beat of competition from U.S. Open champion Justin Rose . - : In a rematch between Tiger Woods and Rory McIlroy, they both win their respective majors for the first time since 2008.