Dustin Johnson’s final tally appeared routine, but his scorecard revealed the madness within.
Johnson started the second round of the RBC Canadian Open, par-bogey-double bogey-bogey, to drop from a share of the lead to outside the top 20.
He then started playing like a U.S. Open champion.
Johnson, who began on the 10th hole, made six birdies in a nine-hole stretch, beginning at the par-5 16th. He dropped a shot at the par-4 eighth and finished with a 1-under 71.
Johnson is at 7 under par for the tournament, the lowest total among the late-early groups at Glen Abbey in Oakville, Ontario.