Jun. 1—Clarkston native Joel Dahmen scaled the leaderboard in both directions Saturday at the RBC Canadian Open before a strong finish. Dahmen capped a down-and-up round with three birdies over the last seven holes for a 1-under-par 69 at Hamilton Golf and Country Club in Ontario. He shares fifth place at 9-under 201 with Tommy Fleetwood, Sam Burns and Trace Crowe. Dahmen is five shots behind …