Rory McIlroy, of Northern Ireland, hits on the driving range during a practice round for the 2015 Masters Tournament at Augusta National on Tuesday, April 7, 2015, in Augusta, Ga. (AP Photo/Chris Carlson)
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Flanked by Tiger Woods' children, Sam, right and Charlie, Lindsey Vonn speaks to Rory McIlroy, of Northern Ireland, during a practice round for the 2015 Masters Tournament at Augusta National on Tuesday, April 7, 2015, in Augusta, Ga. (AP Photo/Chris Carlson)
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Rory McIlroy, left, and Tiger Woods stand on the putting green at the practice facility during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (SARA CORCE/STAFF)
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Rory McIlroy, left, and Tiger Woods stand on the putting green at the practice facility during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (SARA CORCE/STAFF)
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Rory McIlroy, left, and Tiger Woods stand on the putting green at the practice facility during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (SARA CORCE/STAFF)
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Rory McIlroy, left, and Tiger Woods stand on the putting green at the practice facility during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (SARA CORCE/STAFF)
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Rory McIlroy, left, and Tiger Woods stand on the putting green at the practice facility during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (SARA CORCE/STAFF)
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Rory McIlroy putts at the practice range during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (SARA CORCE/STAFF)
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Rory McIlroy putts on No. 10 green during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (CHRIS THELEN/STAFF)
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Rory McIlroy putts with one hand on No. 10 during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (CHRIS THELEN/STAFF)
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Rory McIlroy waits with caddie JP Fitzgerald on No. 10 green during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (CHRIS THELEN/STAFF)
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Rory McIlroy walks with an umbrella on No. 10 during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (CHRIS THELEN/STAFF)
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Rory McIlroy putts with caddie JP Fitzgerald on No. 10 green during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (CHRIS THELEN/STAFF)
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Rory McIlroy walks with an umbrella on No. 10 during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (CHRIS THELEN/STAFF)
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Rory McIlroy waits with caddie JP Fitzgerald on No. 10 green during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (CHRIS THELEN/STAFF)
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Rory McIlroy, of Northern Ireland, walks on No. 13 during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (CHRIS THELEN/STAFF)
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Rory McIlroy walks on No. 13 during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (CHRIS THELEN/STAFF)
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Rory McIlroy, of Northern Ireland, chips to the 13th green during a practice round for the 2015 Masters Tournament at Augusta National on Tuesday, April 7, 2015, in Augusta, Ga. (AP Photo/Charlie Riedel)
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Rory McIlroy, of Northern Ireland, walks across the Ben Hogan Bridge with caddies during a practice round for the 2015 Masters Tournament at Augusta National on Tuesday, April 7, 2015, in Augusta, Ga. (AP Photo/Charlie Riedel)
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Rory McIlroy, of Northern Ireland, hits on the 14th fairway during a practice round for the 2015 Masters Tournament at Augusta National on Tuesday, April 7, 2015, in Augusta, Ga. (AP Photo/Charlie Riedel)
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Rory McIlroy, of Northern Ireland, watches his shot to the 13th green during a practice round for the Masters golf tournament Tuesday, April 7, 2015, in Augusta, Ga. (AP Photo/Charlie Riedel)
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Rory McIlroy, of Northern Ireland, tees off at the 14th hole during a practice round for the 2015 Masters Tournament at Augusta National on Tuesday, April 7, 2015, in Augusta, Ga. (AP Photo/Charlie Riedel)
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Matt Kuchar skips the ball on the water by the No. 16 tee as playing partners Gary Woodland and Rory McIlroy watch, during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (SARA CORCE/STAFF)
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Rory McIlroy, of Northern Ireland, putts on the No. 16 green during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (SARA CORCE/STAFF)
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Rory McIlroy, of Northern Ireland, putts on No. 15 during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (MIKE ADAMS/STAFF)
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Rory McIlroy, left, and Matt Kuchar talk on No. 15 during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (MIKE ADAMS/STAFF)
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Rory McIlroy of Northern Ireland walks off No. 18 green during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (JON-MICHAEL SULLIVAN/STAFF)
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Rory McIlroy lines up a putt on No. 18 during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (JON-MICHAEL SULLIVAN/STAFF)
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Rory McIlroy walks off No. 18 after finishing the course during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (JON-MICHAEL SULLIVAN/STAFF)
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Rory McIlroy puts on his hat on No. 18 during the second practice round at Augusta National Golf Club, Tuesday, April 7, 2015, in Augusta, Georgia. (JON-MICHAEL SULLIVAN/STAFF)