Rooney, whose own vote went to his chief rival Didier Drogba of Chelsea, has scored 34 goals for United this season although he missed yesterday's Premier League win against Tottenham with a groin injury.
He said: "I voted for Cesc Fabregas for the Young Player and Drogba for the senior award.
"I think this has been my best season so far. I've scored a lot of goals and I think overall my play has been good. It has definitely been my most prolific season in front of goal."