Mike Reid and Mark McNulty shot 6-under-66s on Thursday to share the first-round lead in The Tradition, the Champion Tour's fourth major of the year.
David Edwards was a stroke back, and Tom Watson, Ben Crenshaw and Bruce Summerhays shot 68s at the Crosswater Golf Club in the high desert of central Oregon.
Reid's 66 was his lowest score since March.
"It's just been a flat period in my game. I don't have an explanation for it. I've been feeling good," Reid said.
Under sunny conditions, a few spectators watched by boat on the Little Deschutes River that winds through the 7,436-yard course -- the new tournament site.
Reid made a 14-foot-birdie putt on the par-4 18th, one of four birdies he made on the last six holes.
McNulty, who has had lower back problems and also has had a down year on the tour for players 50 and older, birdied his last four holes.
LPGA Tour
Laura Diaz shot a bogey-free 6-under 65 on Thursday to take the first-round lead in the Canadian Women's Open in Edmonton, Alberta, while 17-year-old Michelle Wie opened with a 75 to drop 10 strokes back.
Wie, making her first appearance in the event, closed her late afternoon round with a double bogey on the par-4 ninth. She also had a double-bogey 6 on No. 12, a bogey on the par-5 third and a birdie on the par-4 first.
"Who wouldn't be frustrated today, right?" Wie said. "It's a very frustrating round because I felt like I was driving good and I had two bad holes. I mean, I played very consistently aside from that, made a lot of good par saves. I've just got to break through and shoot a really low score."
Kelli Kuehne and Kyeong Bae opened with 66s at Royal Mayfair, 2005 winner Meena Lee topped a group at 67, and Paula Creamer and Juli Inkster shot 68s. Defending champion Cristie Kerr had a 69, and top-ranked Lorena Ochoa shot a 70 in her first round since winning the Women's British Open at St. Andrews.
PGA Tour
Will MacKenzie shot an 8-under 64 to take a one-shot lead over Lucas Glover, Steve Marino, Brian Davis and Jeff Overton after the first round of the Wyndham Championship in Greensboro, N.C.
Mackenzie, who spent more than a decade away from the sport, nearly made a hole-in-one and had nine birdies to offset one bogey in taking an encouraging first step toward the second victory of his career.
Carl Pettersson, John Merrick, Todd Hamilton, Todd Fischer, Greg Kraft, John Huston and 2003 winner Shigeki Maruyama were two strokes back better.
-- The Associated Press
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