Rory McIlroy, former PGA winner Elkington get into serious Twitter beef

Rory McIlroy missed the cut at the U.S. Open by four shots. (Getty) Rory McIlroy has never been shy about stepping in to defend himself against his critics, wherever they may be. And that was certainly the case on Friday night when the four-time major champion went on offense against 1995 PGA champion Steve Elkington. […]