Mickelson plays on amid news of U.S. probe into possible insider trading

(Adds more Mickelson comments) By Ben Everill DUBLIN, Ohio, May 31 (Reuters) – If golf star Phil Mickelson is concerned by a federal probe into possible insider trading involving him, billionaire investor Carl Icahn and Las Vegas gambler William Walters, he did not show it on Saturday. As he hit a few practice balls before his round at the Memorial Tournament in Dublin, Ohio, Mickelson was in a light-hearted exchange with fellow American golfer Robert Garrigus. “It’s been an interesting evening,” Mickelson replied, adding with a laugh, “I don’t have much to say about it.” Garrigus jokingly intimated that talking with Mickelson could get him into trouble, saying he was “not sure I want to talk to you now.” On Friday night, a source familiar with the matter said the FBI and the U.S. Securities and Exchange Commission were investigating possible insider trading involving Icahn, Mickelson and Walters.