Blaine McCallister shot a six-under-par 65 and held a one-stroke lead over bogey-prone Jim McGovern after three rounds of the B.C. Open Saturday at Endicott, N.Y.
McCallister was at nine-under 204 after 54 holes.
McGovern, who started the day with a one-stroke lead, had an erratic round that included five birdies, a 35-foot eagle and five bogeys. McGovern's final bogey on 18 dropped him into second place.
First-round co-leader Bill Glasson and David Ogrin were another stroke back. Ogrin's 64 was the day's lowest score over the 6,966-yard En-Joie Golf Club course. Three of Ogrin's eight birdies were on his first three holes.
Play was delayed at the start of the third round for 75 minutes because of heavy fog. The skies were blue by the time McGovern and McCallister teed off in the afternoon.
Lee Trevino posted his second consecutive six-under-par 66 and took a three-shot lead after two rounds of the 54-hole Nationwide Seniors Championship at Alpharetta, Ga.
Trevino, who had six birdies and no bogeys on the back nine Friday, played bogey-free with six birdies on the front on Saturday.
Trevino held his lead over defending champion Isao Aoki and Al Geiberger, who had 36-hole totals of 135. Aoki shot a 65 and Geiberger 68.
Jack Nicklaus, who had a 68 in the opening round despite playing with a turned right ankle, rode in a golf cart during his round Saturday and fell back in the pack with a 73 for 141.
First-round leader Mike Hill skied to a 73 and was at 138.
Trevino is seeking his second victory of the season, having won the Cadillac NFL Classic in May.