Sports

Michael Putnam, Tim Petrovic share Canadian Open lead at 6-under 64

  • Mike Weir hits off the seventh tee during first-round play at the Canadian Open golf championship on Thursday, July 24, 2014, in Montreal. (AP Photo/The Canadian Press, Paul Chiasson)

    Mike Weir hits off the seventh tee during first-round play at the Canadian Open golf championship on Thursday, July 24, 2014, in Montreal. (AP Photo/The Canadian Press, Paul Chiasson)  (The Associated Press)

  • Jim Furyk, of the United States, hits off the second tee during first-round play at the Canadian Open golf championship on Thursday, July 24, 2014, in Montreal. (AP Photo/The Canadian Press, Paul Chiasson)

    Jim Furyk, of the United States, hits off the second tee during first-round play at the Canadian Open golf championship on Thursday, July 24, 2014, in Montreal. (AP Photo/The Canadian Press, Paul Chiasson)  (The Associated Press)

  • Michael Putnam, of the USA, lines up his putt on the 18th hole during first round of play at the Canadian Open golf championship Thursday, July 24, 2014 in Montreal.  (AP Photo/The Canadian Press, Paul Chiasson)

    Michael Putnam, of the USA, lines up his putt on the 18th hole during first round of play at the Canadian Open golf championship Thursday, July 24, 2014 in Montreal. (AP Photo/The Canadian Press, Paul Chiasson)  (The Associated Press)

Michael Putnam and Tim Petrovic shared the first-round lead in the Canadian Open on Thursday, shooting 6-under 64 in sunny conditions at rain-softened Royal Montreal.

Canadian amateur Taylor Pendrith and Kyle Stanley were a stroke back, and former Masters champion Charl Schwartzel, Nick Watney and Robert Allenby topped the group at 66.

Two-time champion Jim Furyk and Canadian David Hearn shot 67, and defending champion Brandt Snedeker had a 69.

Dustin Johnson struggled to a 74, and John Daly had a 76.