Phil Mickelson, left, talk with his caddie Jim MacKay before teeing off on the first hole during the third round of the Memorial golf tournament Saturday, May 31, 2014, in Dublin, Ohio. Mickelson says he's co-operating in an insider trading investigation involving him, investor Carl Icahn and Las Vegas gambler Billy Walters but maintains he did nothing wrong. Mickelson's manager confirmed Saturday that the investigation was the same outlined in reports in several newspapers, including the Wall Street Journal. (AP Photo/Jay LaPrete)