Jason Day hits his second shot on No. 1 during the first round of the Masters Tournament at Augusta National Golf Club, Thursday, April 9, 2015, in Augusta, Georgia. (CHRIS THELEN/STAFF)
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Jason Day hits from the sand on No. 2 during the first round of the Masters Tournament at Augusta National Golf Club, Thursday, April 9, 2015, in Augusta, Georgia. (MICHAEL HOLAHAN/STAFF)
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Jason Day tees off on No. 2 during the first round of the Masters Tournament at Augusta National Golf Club, Thursday, April 9, 2015, in Augusta, Georgia. (SARA CORCE/STAFF)
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Jason Day, of Australia, reacts after missing an eagle putt on the 13th hole during the first round of the Masters Tournament at Augusta National Golf Club, Thursday, April 9, 2015, in Augusta, Georgia. (AP Photo/David J. Phillip)
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Jason Day checks his lie in the rough on No. 17 fairway during the first round of the Masters Tournament at Augusta National Golf Club, Thursday, April 9, 2015, in Augusta, Georgia. (CHRIS THELEN/STAFF)
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Jason Day hits from the rough on No. 17 fairway during the first round of the Masters Tournament at Augusta National Golf Club, Thursday, April 9, 2015, in Augusta, Georgia. (CHRIS THELEN/STAFF)
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Jason Day, of Australia, tees off on the 18th hole during the first round of the Masters Tournament at Augusta National Golf Club, Thursday, April 9, 2015, in Augusta, Georgia. (AP Photo/David J. Phillip)
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Jason Day, of Australia, tees off on the 18th hole during the first round of the Masters Tournament at Augusta National Golf Club, Thursday, April 9, 2015, in Augusta, Georgia. (AP Photo/Matt Slocum)
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Jason Day, of Australia, hits out of a bunker on the 17th hole during the first round of the Masters Tournament at Augusta National Golf Club, Thursday, April 9, 2015, in Augusta, Georgia. (AP Photo/Darron Cummings)
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Jason Day hits out of the sand on No. 17 during the first round of the Masters Tournament at Augusta National Golf Club, Thursday, April 9, 2015, in Augusta, Georgia. (CHRIS THELEN/STAFF)
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Jason Day walks up No. 18 during the first round of the Masters Tournament at Augusta National Golf Club, Thursday, April 9, 2015, in Augusta, Georgia. (ANDREW DAVIS TUCKER/STAFF)
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Sergio Garcia, left, and Rickie Fowler walk on No. 18 during the first round of the Masters Tournament at Augusta National Golf Club, Thursday, April 9, 2015, in Augusta, Georgia. (ANDREW DAVIS TUCKER/STAFF)
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Jason Day waves after finishing on the No. 18 green during the first round of the Masters Tournament at Augusta National Golf Club, Thursday, April 9, 2015, in Augusta, Georgia. (ANDREW DAVIS TUCKER/STAFF)
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Jason Day waves after finishing on the No. 18 green during the first round of the Masters Tournament at Augusta National Golf Club, Thursday, April 9, 2015, in Augusta, Georgia. (ANDREW DAVIS TUCKER/STAFF)
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Jason Day, left, and Rickie Fowler shake hands after finishing on No. 18 during the first round of the Masters Tournament at Augusta National Golf Club, Thursday, April 9, 2015, in Augusta, Georgia. (ANDREW DAVIS TUCKER/STAFF)