Spectators watch Rory McIlroy, of Northern Ireland, tee shot on the seventh hole during a practice round for the Masters golf tournament Tuesday, April 9, 2013, in Augusta, Ga. (AP Photo/David Goldman)
Spectators watch Rory McIlroy, of Northern Ireland, tee shot on the seventh hole during a practice round for the Masters golf tournament Tuesday, April 9, 2013, in Augusta, Ga. (AP Photo/David Goldman)
Rory McIlroy won the 2012 PGA Championship by eight shots, which was also his margin of victory in the 2011 U.S. Open. (Zach Boyden-Holmes / The Augusta Chronicle)
Rory McIlroy won the 2012 PGA Championship by eight shots, which was also his margin of victory in the 2011 U.S. Open. (Zach Boyden-Holmes / The Augusta Chronicle)
Tiger Woods, right, talks with Rory McIlroy, of Northern Ireland, as they wait to tee off at the 13th tee during the first round play at the Cadillac Golf Championship in Doral, Fla., Thursday March 7, 2013. (AP Photo/Wilfredo Lee)
Tiger Woods, right, talks with Rory McIlroy, of Northern Ireland, as they wait to tee off at the 13th tee during the first round play at the Cadillac Golf Championship in Doral, Fla., Thursday March 7, 2013. (AP Photo/Wilfredo Lee)
Rory McIlroy, of Northern Ireland, smiles during a news conference at the World Golf Championships Cadillac Championship, in Doral, Fla., Wednesday March 6, 2013. (AP Photo/Alan Diaz)
Rory McIlroy, of Northern Ireland, smiles during a news conference at the World Golf Championships Cadillac Championship, in Doral, Fla., Wednesday March 6, 2013. (AP Photo/Alan Diaz)
Rory McIlroy, of Northern Ireland, watches his tee shot on the 10th hole during the first round of the Honda Classic golf tournament, Thursday, Feb. 28, 2013, in Palm Beach Gardens, Fla. (AP Photo/Wilfredo Lee)
