This much is clear: Rory McIlroy is either going to make history by running away with the 2011 U.S. Open or by blowing up in one of the biggest collapses golf has ever seen. And that second thing isn't very likely.
McIlroy burst from the gate on Sunday with two birdies in the first four holes of his final round, pushing him to 15-under and 16-under and making him the only golfer to ever reach either score in relation to par in a U.S. Open.
The second birdie also made McIlroy's lead over Lee Westwood and Y.E. Yang a full 10-shot advantage, the sort of thing that was once considered the province of Tiger Woods alone. Woods won the 2000 U.S. Open at Pebble Beach with the lowest 72-hole score in relation to par (12-under) in U.S. Open history, and claimed that victory by 15 shots.
McIlroy seems a cinch to break at least that first record. But if the Northern Irish prodigy can keep up his sterling play, that other one is at risk, too.