Amateur Guan Tianlang, of China, during the third round of the Masters golf tournament Saturday, April 13, 2013, in Augusta, Ga. (AP Photo/Charlie Riedel)
Phil Mickelson chips to the second green during the third round of the Masters golf tournament Saturday, April 13, 2013, in Augusta, Ga. (AP Photo/David J. Phillip)
Tiger Woods reacts after his fairway shot on the 15th hole hit the pin and rolled into the water during the second round of the Masters golf tournament Friday, April 12, 2013, in Augusta, Ga. (AP Photo/Darron Cummings)
Fred Couples tips his cap after a birdie on the 18th green during the second round of the Masters golf tournament Friday, April 12, 2013, in Augusta, Ga. (AP Photo/David J. Phillip)
Jason Day, of Australia, waves to the gallery on the 18th hole during the second round of the Masters golf tournament Friday, April 12, 2013, in Augusta, Ga. (AP Photo/David Goldman)
Dustin Johnson misses a putt on the 15th green for a double bogie on the hole during the second round of the Masters golf tournament Friday, April 12, 2013, in Augusta, Ga. (AP Photo/Charlie Riedel)
Angel Cabrera, of Argentina, chips to the second green during the second round of the Masters golf tournament Friday, April 12, 2013, in Augusta, Ga. (AP Photo/Matt Slocum)
Bubba Watson hits out of the crowd on the fourth fairway during the first round of the Masters golf tournament Thursday, April 11, 2013, in Augusta, Ga. (AP Photo/Charlie Riedel)