Guan Tianlang, the 14-year-old Chinese amateur, shot a 77 to drop to 2 over last among the 71 players who made the cut. He tied for 58th two weeks ago in the Masters after becoming the youngest player to make the cut at Augusta National, and will play in a U.S. Open qualifier in two weeks in Dallas.
Kevin Stadler was 11 under after a 65 matching Stanley for the best round of the day. Boo Weekley, a stroke behind Glover entering the round, salvaged a 73 with a two-putt birdie on the 18th to finish at 10 under.
Carlota Ciganda shot a 5-under 66 to take a two-stroke lead over the world's No. 1 player and an LPGA Tour rookie into the final round of the inaugural North Texas LPGA Shootout at Irving, Texas.
Ciganda had only one bogey in the third round. Even after driving right into a concrete drainage ditch on No. 12, the Spaniard hit the half-submerged ball out of the water to about 10 feet and made the birdie putt. She was at 11-under 202 after her second 66 of the week.
Top-ranked Inbee Park finished her 67 with consecutive birdies. Caroline Masson, the leader after each of the first two rounds, recovered from an opening double bogey for a 69.
Na Yeon Choi, the No. 3 player, was 8 under after a bogey-free 66.
Roger Chapman and St. George's Jay Don Blake teamed to shoot an 11-under 61 to take a one-stroke lead in the Champions Tour's Legends of Golf better-ball tournament at Savannah, Ga.
Chapman and Blake were 17 under. The teams of Bernhard Langer-Tom Lehman, Brad Faxon-Jeff Sluman, Scott Hoch-Jim Gallagher Jr., Craig Stadler-Kirk Triplett and Brad Faxon-Jeff Sluman were tied for second.
Lucas Glover -14
Kyle Stanley -12
Jimmy Walker -12
Billy Horschel -12
D.A. Points -12