Tiger Woods three-putted the seventh hole for a bogey, dropping back to 19 under.
Jim Furyk, playing in the final twosome, birdied the same hole, cutting Tiger’s lead to four strokes.
With Rory Sabbatini having withdrawn before the final round, Brett Wetterich teed off alone at 9:45 a.m.
Wetterich made it around in 2 hours, 22 minutes, shooting a 3-under 69.
“I just wanted to go out and play a good round,” said Wetterich, who was informed he was going solo Sunday morning.
Wetterich said it wasn’t the first time he’d played alone, having finished in 2:10 at Hartford, Conn.
“The back side (at Sherwood Country Club) is a little hilly,” Wetterich joked of the extra 12 minutes.
Rory Sabbatini, who made headlines this spring when he said Tiger Woods was “more beatable than ever,” withdrew before Sunday’s final round with what perhaps was a bruised ego.
After opening with a 69, Sabbatini shot rounds of 81 and 76 to drop into last place in the 16-player field at 10-over 226 _ 28 strokes behind Woods, the tournament host.
Officially, Sabbatini withdrew because of “personal reasons.”
Tiger Woods shot a 5-under 67 on Saturday and leads Jim Furyk by six shots and Zach Johnson by seven. Woods has the largest 54-hole lead in the Target World Challenge history.
“Seven shots is too much behind Tiger Woods, just because of what hes done, Johnson said. “Freakish things can happen. Anything is possible. But the guy, if hes in the lead, the gap seems to go the other way.
Woods has won the tournament three times but always came from behind to win.
Trailing by three shots, Jim Furyk put his tee shot on the par-3 15th into the water in front of the green.
He had to hit his next from the drop zone on the women’s tee, known to golf writers as the circle of shame because it’s marked by a painted circle.
Furyk’s third shot hit just past the pin and spun back about 10 feet below the hole. His bogey putt lipped out, giving him a double bogey and dropping him five behind Tiger Woods.
After opening with an 8-over 80, Colin Montgomerie has posted rounds of 67 and 69 to get to even-par 216.
Rory Sabbatini has gone in the other direction. He shot a 69 in the first round, but has followed that with an 81 and a 76 to drop into last place at 10-over 226.
Sabbatini led Monty by 11 shots after Thursday’s round, but now finds himself 10 behind the Scotsman.