
Rory McIlroy has aimed a jab at Phil Mickelson after allegations were made in a book that the American golfer tried to place a wager on the 2012 Ryder Cup.
In the soon to be published book, prominent sports gambler Billy Walters claims that he and Mickelson discussed a potential $400,000 (£315,000) bet on the event while the left-hander was playing at Medinah.