Rory McIlroy and noncompeting marker Jeff Knox - 2014 Masters
1 of 7
Rory McIlroy and noncompeting marker Jeff Knox walk down the No. 1 fairway during the third round of the 2014 Masters Tournament at the Augusta National Golf Club on April 12, 2014, in Augusta, Ga. (Andrew Davis Tucker/Staff)
2 of 7
Rory McIlroy walks off the No. 1 tee during the third round of the 2014 Masters Tournament at the Augusta National Golf Club on April 12, 2014, in Augusta, Ga. (Andrew Davis Tucker/Staff)
3 of 7
Rory McIlroy (right) and non-competing marker Jeff Knox, left, walk up on No. 1 fairway during the third round of the Masters Tournament at Augusta National Golf Club on Saturday, April 12, 2014, in Augusta, Ga. (Sara Caldwell/Staff)
4 of 7
Rory McIlroy (right) and non-competing marker Jeff Knox watch McIlroy's tee shot on No. 3 during the third round of the Masters Tournament at Augusta National Golf Club on Saturday, April 12, 2014, in Augusta, Ga. (Sara Caldwell/Staff)
5 of 7
Rory McIlroy, second from left, and non-competing marker Jeff Knox, second from right, walk up on No. 1 fairway during the third round of the Masters Tournament at Augusta National Golf Club on Saturday, April 12, 2014, in Augusta, Ga. (Sara Caldwell/Staff)
6 of 7
When there is an odd-number of players making the cut, Augusta National member and amateur golfer Jeff Knox plays as a non-competing marker. His score does not count. Jeff Knox (left) and Rory McIlroy walk down the No. 8 fairway during the third round of the 2014 Masters Tournament at the Augusta National Golf Club on April 12, 2014, in Augusta, Ga. (ANDREW DAVIS TUCKER/STAFF)
7 of 7
Rory McIlroy, of Northern Ireland, walks with Jeff Knox, right, down the eighth fairway during the third round of the Masters Tournament at Augusta National Golf Club on Saturday, April 12, 2014, in Augusta, Ga. (AP Photo/Darron Cummings)