Robert Garrigus combined his power with a few timely putts at rain-softened Hamilton layout for a 6-under 64 on Saturday and the third-round lead at the Canadian Open in Ancaster, Ontario.
Garrigas also broke the 54-hole scoring record at golf's third-oldest championship that was first set more than a half-century ago by Arnold Palmer. He had a one-shot lead over William McGirt (66).
Garrigus was at 16-under 194, one shot better than Palmer in 1955 at Weston and matched two years ago by Dean Wilson at St. George's, both in Toronto.
"Oops. Sorry, Arnie," Garrigus said when told about the record.
Palmer went on to win the 1955 Canadian Open for the first of his 62 tour titles. Garrigus will be going for his second win.
He was fortunate to escape with par, not to mention his health, on the final hole when his 3-iron off the tee ran out 290 yards and just short of the bridge. Because he was inside the hazard, he couldn't ground the club and had a rules official make sure the bridge wasn't beneath the ball. It was a few inches ahead of the ball.
"If I hit it a millimeter fat, I break my wrist," Garrigus said.
The 72-hole scoring record belongs to another Palmer -- Johnny Palmer -- who had a 263 in 1952 at St. Charles in Winnipeg, Manitoba.
Scott Piercy had a 67 and was two shots behind. Scott Stallings (63), who won last week in Mississippi, Chris Kirk (63) and Bo Van Pelt (67) were all four back.
Couples had seven birdies in a round of 64 despite strong wind and some showers, while Peter Fowler finished with a 65 to trail the leader by two shots.
"I'm just happy to be in the hunt with 18 holes to play," said Langer, who won this title two years ago at Carnoustie.
John Cook (66) and Barry Lane (66) joined overnight leader Gary Hallberg (73) four shots back.
Tom Watson (66) and Tom Lehman (73) were seven behind Langer.
LPGA Tour: Stacy Lewis made a birdie on the last hole to share the lead with Inbee Park after the third round of the Evian Masters in Evian-les-Bains, France.
Lewis, who's chasing her third tour title of the year, had a 1-over 73 for an 11-under 205 total. The overnight leader had two bogeys and a double bogey on the back nine before a birdie on the 18th.
"I knew I needed to make birdie (at 18) to get in the last group," Lewis said. "It's also nice just to see a putt go in."
Park had four birdies and two bogeys for a 70.
Karrie Webb (67), Natalie Gulbis (68) and 17-year-old amateur Hyo Joo Kim (69) were a shot behind.
Pleasanton native Paula Creamer struggled to a 73 for a 208, while recent Stanford grad Michelle Wie (76) was at 221.
Web.com Tour: Ben Kohles shot a 4-under 67 and moved into the lead at the Nationwide Children's Hospital Invitational in Columbus, Ohio. He was at 11-under 202, two shots ahead of Aaron Watkins (65), Cliff Kresge (64) and Trevor Murphy (73). Former Stanford star Joseph Bramlett (70) was three shots back.
European Tour: Bernd Wiesberger had a 7-under 65 to win the Austrian Open by three shots. The Austrian finished at 19-under 269 in Atzenbrugg.
Wire services contributed to this report.