ded, to me, the answer is clear.No.This major was a great performance, but it will not define his career???it will only be the spark that ignited it.See, Rory is a young player with a bright future ahead of him???no, this did not define his career, but it is the start of great things.If McIlroy can continue to swing like he did at the US Open, he will go down as one of the greatest players in golf