Angel Cabrera, of Argentina, lines up a putt on the 10th hole during the second round of the Wells Fargo Championship golf tournament in Charlotte, N.C., Friday, May 2, 2014. (AP Photo/Chuck Burton)
Angel Cabrera, of Argentina, watches his tee shot on the 11th hole during the second round of the Wells Fargo Championship golf tournament in Charlotte, N.C., Friday, May 2, 2014. (AP Photo/Chuck Burton)
Webb Simpson lines up a putt on the 11th hole during the second round of the Wells Fargo Championship golf tournament in Charlotte, N.C., Friday, May 2, 2014. (AP Photo/Chuck Burton)
Ernie Els, of South Africa, putts on the 12th green during the second round of the Wells Fargo Championship golf tournament in Charlotte, N.C., Friday, May 2, 2014. (AP Photo/Chuck Burton)
Phil Mickelson watches his approach shot on the 12th hole during the second round of the Wells Fargo Championship golf tournament in Charlotte, N.C., Friday, May 2, 2014. (AP Photo/Chuck Burton)
Retief Goosen, of South Africa, watches his shot from a sand trap on the 10th hole during the second round of the Wells Fargo Championship golf tournament in Charlotte, N.C., Friday, May 2, 2014. (AP Photo/Nell Redmond)
K.J. Choi reacts as he misses a putt on the 11th hole during the second round of the Wells Fargo Championship golf tournament in Charlotte, N.C., Friday, May 2, 2014. (AP Photo/Nell Redmond)
Trevor Immelman, of South Africa, watches his tee shot on the 11th hole during the second round of the Wells Fargo Championship golf tournament in Charlotte, N.C., Friday, May 2, 2014. (AP Photo/Nell Redmond)
Padraig Harrington, of Ireland, watches his tee shot on the 11th hole during the second round of the Wells Fargo Championship golf tournament in Charlotte, N.C., Friday, May 2, 2014. (AP Photo/Nell Redmond)
Derek Ernst lines up a putt on the 12th green during the second round of the Wells Fargo Championship golf tournament in Charlotte, N.C., Friday, May 2, 2014. (AP Photo/Nell Redmond)