Hunter Mahan hits out of a bunker on the eight hole during the first round of the Houston Open golf tournament on Thursday, April 3, 2014, in Humble Texas. (AP Photo/Patric Schneider)
Defending champion D.A. Points hits out of a bunker on the eighth hole during the first round of the Houston Open golf tournament, Thursday, April 3, 2014, in Humble Texas. (AP Photo/Patric Schneider)
Bill Haas birdies on the eighth hole during the first round of the Houston Open golf tournament, Thursday, April 3, 2014, in Humble Texas. (AP Photo/Patric Schneider)
Bill Haas tees off on the ninth hole during the first round of the Houston Open golf tournament, Thursday, April 3, 2014, in Humble Texas. (AP Photo/Patric Schneider)
Bill Haas watches his shot on the eight hole during the first round of the Houston Open golf tournament on Thursday, April 3, 2014, in Humble Texas. (AP Photo/Patric Schneider)
Phil Mickelson, right, smiles at his caddie Jim Mackay as he birdies on the fourth hole during the first round of the Houston Open golf tournament on Thursday, April 3, 2014, in Humble Texas. (AP Photo/Patric Schneider)
Keegan Bradley measures his shot on the fourth green during the first round of the Houston Open golf tournament on Thursday, April 3, 2014, in Humble Texas. (AP Photo/Patric Schneider)
Rory McIlroy hits on the third hole during the first round of the Houston Open golf tournament on Thursday, April 3, 2014, in Humble Texas. (AP Photo/Patric Schneider)
Keegan Bradley takes a shot on the sixth hole during the first round of the Houston Open golf tournament on Thursday, April 3, 2014, in Humble Texas. (AP Photo/Patric Schneider)
Matt Kuchar tees off on the sixth hole during the first round of the Houston Open golf tournament, Thursday, April 3, 2014, in Humble Texas. (AP Photo/Patric Schneider)
Keegan Bradley tees off on hole four during the first round of the Houston Open golf tournament, Thursday, April 3, 2014, in Humble Texas. (AP Photo/Patric Schneider)