Dustin Johnson takes his second shot on off the rough on the first hole during the second round of the Masters Tournament at Augusta National Golf Club Friday, April 12, 2013, in Augusta, Ga. (AP Photo/Darron Cummings)
2 of 19
Dustin Johnson hits an approach shot to the first 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)
3 of 19
Dustin Johnson takes his second shot on off the rough on the first hole during the second round of the Masters Tournament at Augusta National Golf Club Friday, April 12, 2013, in Augusta, Ga. (AP Photo/Darron Cummings)
4 of 19
Dustin Johnson hits off the second fairway during the second round of the Masters Tournament at Augusta National Golf Club Friday, April 12, 2013, in Augusta, Ga. (AP Photo/Charlie Riedel)
5 of 19
Dustin Johnson makes a drop on the second fairway during the second round of the 2013 Masters Tournament at Augusta National Golf Club on Friday, April 12, 2013, in Augusta, Ga. (MICHAEL HOLAHAN/STAFF)
6 of 19
Dustin Johnson acknowledges the gallery after making par on the seventh green during the second round of the 2013 Masters Tournament at Augusta National Golf Club on Friday, April 12, 2013, in Augusta, Ga. (SARA CALDWELL/STAFF)
7 of 19
Dustin Johnson putts on No. 7 during the second round of the 2013 Masters Tournament at Augusta National Golf Club on Friday, April 12, 2013, in Augusta, Ga. (SARA CALDWELL/STAFF)
8 of 19
Dustin Johnson hits off the 13th fairway during the second round of the 2013 Masters Tournament at Augusta National Golf Club on Friday, April 12, 2013, in Augusta, Ga. (AP Photo/Charlie Riedel)
9 of 19
Dustin Johnson acknowledges the gallery after making par on the sixth 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)
10 of 19
Dustin Johnson acknowledges the gallery after making par on the sixth 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)
11 of 19
Dustin Johnson misses a putt on the 15th green for a double bogie on the 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)
12 of 19
Dustin Johnson walks 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. (ANDREW DAVIS TUCKER/STAFF)
13 of 19
Dustin Johnson, left, speaks to an official on the 15th fairway 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)
14 of 19
Dustin Johnson lines up a putt 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. (ANDREW DAVIS TUCKER/STAFF)
15 of 19
Dustin Johnson walks to the 13th 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)
16 of 19
Dustin Johnson walks on the 16th 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)
17 of 19
Dustin Johnson waits on No. 16 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)
18 of 19
Dustin Johnson walks on No. 16 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)
19 of 19
Dustin Johnson reacts to his tee shot on No. 16 during the second round of the 2013 Masters Tournament at Augusta National Golf Club on April 12, 2013, in Augusta, Ga. (ANDREW DAVIS TUCKER/STAFF)