Jason Day, of Australia, tees off on the fourth hole during the second round of the Masters Tournament at Augusta National Golf Club Friday, April 12, 2013, in Augusta, Ga. (AP Photo/David Goldman)
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Jason Day, of Australia, tees off on the third hole during the second round of the Masters Tournament at Augusta National Golf Club Friday, April 12, 2013, in Augusta, Ga. (AP Photo/Matt Slocum)
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Rickie Fowler, right, lines up his putt as Jason Day, of Australia, walks off the 13th green during the second round of the Masters Tournament at Augusta National Golf Club Friday, April 12, 2013, in Augusta, Ga. (AP Photo/David Goldman)
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Jason Day smiles after putting on No. 13 during the second round of the 2013 Masters Tournament at Augusta National Golf Club on Friday, April 12, 2013, in Augusta, Ga. (JON-MICHAEL SULLIVAN/STAFF)
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Jason Day points after putting on No. 13 during the second round of the 2013 Masters Tournament at Augusta National Golf Club on Friday, April 12, 2013, in Augusta, Ga. (JON-MICHAEL SULLIVAN/STAFF)
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Jason Day tees off on No. 12 during the second round of the Masters Tournament at Augusta National Golf Club Friday, April 12, 2013, in Augusta, Ga. (ANDREW DAVIS TUCKER/STAFF)
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Jason Day walks across the Nelson Bridge to the No. 12 green after taking a drop on No. 12 during the second round of the Masters Tournament at Augusta National Golf Club Friday, April 12, 2013, in Augusta, Ga. (ANDREW DAVIS TUCKER/STAFF)
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Jason Day tees off on No. 12 during the second round of the Masters Tournament at Augusta National Golf Club Friday, April 12, 2013, in Augusta, Ga. (ANDREW DAVIS TUCKER/STAFF)
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Jason Day walks across the Nelson Bridge to the No. 12 green after taking a drop on No. 12 during the second round of the Masters Tournament at Augusta National Golf Club Friday, April 12, 2013, in Augusta, Ga. (ANDREW DAVIS TUCKER/STAFF)
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From left, Padraig Harrington, Rickie Fowler and Jason Day walk to the No.12 green during the second round of the 2013 Masters Tournament at Augusta National Golf Club on Friday, April 12, 2013, in Augusta, Ga. (ANDREW DAVIS TUCKER/STAFF)
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Jason Day, of Australia, waves after a birdie putt on the 16th green during the second round of the Masters Tournament at Augusta National Golf Club on Friday, April 12, 2013, in Augusta, Ga. (AP PhotoDavid Goldman)
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Padraig Harrington, left, of Ireland, and Jason Day, of Australia, walk up the 16th fairway during the second round of the Masters Tournament at Augusta National Golf Club on Friday, April 12, 2013, in Augusta, Ga. (AP PhotoDavid Goldman)
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Jason Day, of Australia, chips out of a bunker on the 16th hole during the second round of the Masters Tournament at Augusta National Golf Club Friday, April 12, 2013, in Augusta, Ga. (AP Photo/Charlie Riedel)
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Jason Day, left, walks with Padraig Harrington to the 14th tee during the second round of the 2013 Masters Tournament at Augusta National Golf Club on Friday, April 12, 2013, in Augusta, Ga. (JON-MICHAEL SULLIVAN/STAFF)
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Jason Day reacts to a birdie putt on No. 16 during the second round of the 2013 Masters Tournament at Augusta National Golf Club on April 12, 2013, in Augusta, Ga. (SARA CALDWELL/STAFF)
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Jason Day putts on No. 16 during the second round of the 2013 Masters Tournament at Augusta National Golf Club on April 12, 2013, in Augusta, Ga. (SARA CALDWELL/STAFF)
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Jason Day, of Australia, waves to the gallery on the 18th hole during the second round of the Masters Tournament at Augusta National on Friday, April 12, 2013, in Augusta, Ga. (AP Photo/David Goldman)
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Jason Day acknowledges the gallery after finishing on No. 18 during the second round of the 2013 Masters Tournament at Augusta National Golf Club on Friday, April 12, 2013, in Augusta, Ga. (JEFF JANOWSKI/STAFF)
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Jason Day reacts to his par putt on 17 during the second round of the 2013 Masters Tournament at Augusta National Golf Club on April 12, 2013, in Augusta, Ga. (SARA CALDWELL/STAFF)
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Jason Day, left, shakes hands with Rickie Fowler after finishing their round on the 18th green during the second round of the 2013 Masters Tournament at Augusta National Golf Club on Friday, April 12, 2013, in Augusta, Ga. (JON-MICHAEL SULLIVAN/STAFF)
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Jason Day waves as he walks to the 18th green during the second round of the 2013 Masters Tournament at Augusta National Golf Club on Friday, April 12, 2013, in Augusta, Ga. (JON-MICHAEL SULLIVAN/STAFF)
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Jason Day waves as he walks to 18th green during the second round of the 2013 Masters Tournament at Augusta National Golf Club on Friday, April 12, 2013, in Augusta, Ga. (ANDREW DAVIS TUCKER/STAFF)