Rory McIlroy endured a disastrous opening nine to his second round at the Memorial Tournament as three consecutive double bogeys saw him go tumbling down the leaderboard in Ohio on Friday.
The Northern Irishman had opened with a sparkling 63 on Thursday to give him a three-shot lead over Paul Casey, Bubba Watson and Chris Kirk as he continued the good from from his BMW PGA Championship victory at Wentworth.
But, after starting on the back nine, McIlroy bogeyed the 10th in his second round before parring 11 and picking the shot back up on 12.
That was to be as good as it got on his opening nine, though, as double bogeys followed on 13, 14 and 15 before two pars and a further bogey saw him reach the turn in 43, four shots off the lead.
That represented a 12-shot collapse on the back nine from Thursday where he had picked up two eagles, three birdies and a double bogey to record a 31.
With Kirk, Watson and Casey all due to start their rounds later in the day, Camilo Villegas was the big winner in the early stages, moving into a share of the lead with six birdies and a bogey in his first 14 holes.
Robert Garrigus was also surging up the leaderboard and he sat one shot off the lead with a flawless five birdies through 15.