McIlroy recently recorded his first U.S. Tour victory, achieved with the closing rounds of 66 and 62 at Quail Hollow.
Though the tournament ended on 02 May, two days before his 21st birthday, is the start date that made him eligible for the award.
“The final round was one of those rounds that you will never forget to be honest,” he said. “I was in a good mood to go out I knew I had a chance.
“There is no better feeling in the world to go out and beat a quality field with a good course.”