Tiger Woods reacts after putting on the 14th hole during the first round of the U.S. Open golf tournament at Merion Golf Club, Friday, June 14, 2013, in Ardmore, Pa. (AP Photo/Morry Gash)
Phil Mickelson reacts after his birdie putt on the ninth hole during the first round of the U.S. Open golf tournament at Merion Golf Club, Thursday, June 13, 2013, in Ardmore, Pa. (AP Photo/Charlie Riedel)
Phil Mickelson reacts to a missed birdie putt on the 17th hole during the first round of the U.S. Open golf tournament at Merion Golf Club, Thursday, June 13, 2013, in Ardmore, Pa. (AP Photo/Morry Gash)
Course workers clear water from the second fairway after a weather delay during the first round of the U.S. Open golf tournament at Merion Golf Club, Thursday, June 13, 2013, in Ardmore, Pa. (AP Photo/Darron Cummings)
Spectators watch golfers on the 17th green during practice for the U.S. Open golf tournament at Merion Golf Club, Wednesday, June 12, 2013, in Ardmore, Pa. (AP Photo/Charlie Riedel)
Tiger Woods smiles as he walks up the 18th hole during practice for the U.S. Open golf tournament at Merion Golf Club, Wednesday, June 12, 2013, in Ardmore, Pa. (AP Photo/Morry Gash)
Arnold Palmer, left, and Tiger Woods watch as golfers tee off on the first hole during practice for the U.S. Open golf tournament at Merion Golf Club, Tuesday, June 11, 2013, in Ardmore, Pa. (AP Photo/Gene J. Puskar)
Rory McIlroy, of Northern Ireland, watches his putt on the first green during practice for the U.S. Open golf tournament at Merion Golf Club, Tuesday, June 11, 2013, in Ardmore, Pa. (AP Photo/Darron Cummings)
Tiger Woods speaks during a news conference at the U.S. Open golf tournament at Merion Golf Club, Tuesday, June 11, 2013, in Ardmore, Pa. (AP Photo/Gene J. Puskar)
Masters champion Adam Scott, right, speaks with an unidentified person on the driving range at the U.S. Open golf tournament in Ardmore, Pa., Monday, June 10, 2013. (AP Photo/The Philadelphia Inquirer, Clem Murray)