• Photo Gallery: RBC Canadian Open, Round 1

  • Michael Putnam's six birdies in his bogey-free first round were enough to carry him into a tie atop the leaderboard at 6-under with Tim Petrovic. (Sam Greenwood/Getty Images)Michael Putnam's six birdies in his bogey-free first round were enough to carry him into a tie atop the leaderboard at 6-under with Tim Petrovic. (Sam Greenwood/Getty Images)