Chad Campbell shot a 9-under 63 on Friday in the Canadian Open to take a two-stroke lead over Brian Harman.
Campbell birdied all four par 5s at Glen Abbey in his bogey-free round to reach 14-under 130. The 41-year-old Texan won the last of his four PGA Tour titles in 2007.
Harman followed his opening 65 with a 67.
Canada's David Hearn was tied for third at 11 under after a 64.
Hearn is trying to become the first Canadian to win the event since Pat Fletcher, born in England, in 1954 at Point Grey in Vancouver. Carl Keffer is the only Canadian-born champion, winning in 1909 and 1914. Albert Murray, a Canadian also born in England, won in 1908 and 1913.
Johnson Wagner also was 11 under after a 66. Jason Day, coming off a tie for fourth Monday in the British Open, was another stroke back after a 66.