The 44-year-old Furyk, the 2006 winner at Hamilton and 2007 champion at Angus Glen, had a 15-under 195 total after opening with rounds of 67 and 63. He won the last of his 16 PGA Tour titles in 2010.
Coming off a final-round 65 in a fourth-place finish last week in the British Open last Sunday, Furyk has had only one bogey — on the fourth hole of the first round — at Royal Montreal. He leads the field in greens in regulation, hitting 45 of 54 greens, and his tied for third in fairways hit at 33 of 42.
South Africa’s Tim Clark was second after a 64 on the tree-lined Blue Course.
Kyle Stanley had a 68 to reach 10 under, and Jamie Lovemark was another stroke back after a 67. Graham DeLaet, trying to become the first Canadian winner in 60 years, was tied for fifth at 8 under after a 70.
The 56-year-old German matched the Champions Tour record for the largest 54-hole lead in a 72-hole event set by Jack Nicklaus in the 1991 Senior PGA. At 14 under, Langer also tied the tournament 54-hole record set by Carl Mason at 14-under 196 in 2003 at Turnberry.
Langer won the 2010 tournament at Carnoustie and lost in a playoff last year at Royal Birkdale. He won the Senior Players Championship last month for his third senior major victory and has three Champions Tour wins this year to push his career total to 21.
Canada’s Rick Gibson was second after a 66. Former Wheeler golfer Bob Tway was 5 under after a 66.
International Crown: Inbee Park and So Yeon Ryu both birdied the first playoff hole and South Korea eliminated the top-seeded United States and earned a wild-card berth in the finale.
The South Koreans will join Spain, Thailand, Japan and Sweden today in a duel for title.
After the American team of Cristie Kerr and Lexi Thompson beat sisters Ariya and Moriya Jutanugarn 3 and 2 in better-ball play, Thailand’s Pornanong Phatlum and Onnarin Sattayabanphot edged the team of Paula Creamer and Stacy Lewis 1-up to leave the U.S. in third place in Pool A.
South Korea, the third-place finisher in Pool B, called upon Park and Ryu to face Kerr and Thompson in a wild-card playoff on the par-5 16th hole.