Dustin Johnson lines up a putt on No. 2 during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (MICHAEL HOLLAHAN/STAFF)
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Dustin Johnson putts on the sixth green during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (AP Photo/Charlie Riedel)
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Dustin Johnson tees off on No. 15 during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (CHRIS THELEN/STAFF)
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Dustin Johnson tees off on No. 15 during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (CHRIS THELEN/STAFF)
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Dustin Johnson and caddie Austin Johnson walk off No. 14 green during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (ANDREW DAVIS TUCKER/STAFF)
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Dustin Johnson sizes up a putt on No. 14 during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (ANDREW DAVIS TUCKER/STAFF)
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Dustin Johnson lines up a putt on No. 14 during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (ANDREW DAVIS TUCKER/STAFF)
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Dustin Johnson waits his turn on No. 14 during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (ANDREW DAVIS TUCKER/STAFF)
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Dustin Johnson putts on No. 14 during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (ANDREW DAVIS TUCKER/STAFF)
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Dustin Johnson drives from No. 15 during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (ANDREW DAVIS TUCKER/STAFF)
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Dustin Johnson waves to the gallery as we walks down No. 15 during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (ANDREW DAVIS TUCKER/STAFF)
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Dustin Johnson watches his shot on the 12th fairway during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia.
(AP Photo/David J. Phillip)
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Dustin Johnson chips to the 10th green during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia.
(AP Photo/Charlie Riedel)
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Dustin Johnson reacts to a missed putt on the 13th hole during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia.
. (AP Photo/Chris Carlson)
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Dustin Johnson, left, and Adam Scott, of Australia, walk across the Nelson Bridge during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (AP Photo/David J. Phillip)
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Dustin Johnson, left, and Adam Scott walk to the No. 14 tee during the second round of the Masters Tournament at Augusta National Golf Club on Friday, April 10, 2015, in Augusta, Georgia. (JON-MICHAEL SULLIVAN/STAFF)
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Dustin Johnson waves after chipping to No. 13 green during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (JON-MICHAEL SULLIVAN/STAFF)
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Dustin Johnson reacts after putting on No. 13 during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (JON-MICHAEL SULLIVAN/STAFF)
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Dustin Johnson reacts to his chip to No. 13 green during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (JON-MICHAEL SULLIVAN/STAFF)
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Dustin Johnson holds up his ball after a birdie on the 15th hole during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (AP Photo/Darron Cummings)
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Dustin Johnson tees off on the 18th hole during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (AP Photo/Charlie Riedel)
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Dustin Johnson waves after finishing on No. 17 during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (CHRIS THELEN/STAFF)
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Dustin Johnson waves after finishing on No. 17 during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (CHRIS THELEN/STAFF)
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Dustin Johnson tees off on No. 18 during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (CHRIS THELEN/STAFF)
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Dustin Johnson, right, takes a club from his caddie Austin Johnson as they walk to No. 18 green during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (ANDREW DAVIS TUCKER/STAFF)
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Dustin Johnson walks on No. 18 during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (ANDREW DAVIS TUCKER/STAFF)
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Dustin Johnson, right, and Adam Scott walk to No. 15 green during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (MICHAEL HOLAHAN/STAFF)
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Dustin Johnson, right, and Adam Scott walk to No. 15 green during the second round of the Masters Tournament at Augusta National Golf Club, Friday, April 10, 2015, in Augusta, Georgia. (MICHAEL HOLAHAN/STAFF)