Stewart Cink watches his tee shot on the sixth hole during the second round of the Wells Fargo Championship golf tournament in Charlotte, N.C., Friday, May 2, 2014. (AP Photo/Nell Redmond)
Angel Cabrera, of Argentina, walks down the 10th fairway during the second round of the Wells Fargo Championship golf tournament in Charlotte, N.C., Friday, May 2, 2014. (AP Photo/Chuck Burton)
Rory McIlroy, of Northern Ireland, reacts after missing a putt on the fifth hole during the second round of the Wells Fargo Championship golf tournament in Charlotte, N.C., Friday, May 2, 2014. (AP Photo/Nell Redmond)
Rory McIlroy, of Northern Ireland, watches his tee shot on the fourth hole during the second round of the Wells Fargo Championship golf tournament in Charlotte, N.C., Friday, May 2, 2014. (AP Photo/Nell Redmond)
Phil Mickelson hits from the rough 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)
Justin Rose, of England, putts on the 13th hole during the second round of the Wells Fargo Championship golf tournament in Charlotte, N.C., Friday, May 2, 2014. (AP Photo/Chuck Burton)
Martin Flores, right, smiles as he walks off the 18th green during the second round of the Wells Fargo Championship golf tournament in Charlotte, N.C., Friday, May 2, 2014. (AP Photo/Chuck Burton)