Pat Perez is just two shots off the lead

The 23-year-old Gossett, with sister Joni caddying, shot a 70, and Roberts a 71.

Pat Perez and Canadian Ian Leggatt were two strokes behind, and Jerry Kelly follows that pair at eight-under.

Roberts, a seven-time winner on the PGA Tour, had the lead at 10 under on Saturday morning after the completion of the suspended second round, but dropped back with bogeys on holes nine and ten before rallying with birdies at 13 and 16.

Gossett, the 1999 US Amateur champion who won the John Deere Classic last year to join the PGA Tour, bogeyed the par-three 16th after reaching 11-under on the par-three 14th.

Hal Sutton and David Toms, both PGA winners, were four strokes further back at seven-under.

Leading scores after day three of the Buick Classic:
(US unless stated)

11 under: Chris Smith 66 69 67
10 under: Loren Roberts 64 68 71, David Gossett 66 67 70
9 under: Pat Perez 67 70 67, Ian Leggatt (Can) 69 68 67
8 under: Jerry Kelly 65 70 70
7 under: Hal Sutton 71 68 67, David Toms 70 68 68
6 under: Stephen Ames (Trin) 70 71 66, Stewart Cink 67 69 71,Jose Coceres (Arg) 68 68 71
5 under: Briny Baird 70 70 68, Tom Lehman 68 72 68, Peter Lonard (Aus) 71 68 69, Sergio Garcia (Spa) 68 70 70, Bryce Molder 71 66 71
4 under: Paul Gow (Aus) 68 73 68, Michael Muehr 65 76 68, Phil Tataurangi (Nzl) 69 70 70, Kevin Sutherland 73 69 67, Retief Goosen (Rsa) 67 72 70, J.J. Henry 71 68 70, Steve Elkington 67 71 71, Ernie Els (Rsa) 68 69 72