US Open champion Dustin Johnson shook off a double-bogey to maintain a share of the lead alongside Luke List after two rounds of the PGA Tour Canadian Open. Johnson, who started Friday tied with List for the lead, fell back early as he dropped four shots in his first four holes at Glen Abbey near Toronto. With four more birdies coming in and one bogey at his penultimate hole Johnson signed for a one-under 71 that left him tied with List on seven-under 137.
