Updated

With a chance to build a big lead, Rory McIlroy put it in reverse Friday at the Memorial.

McIlroy made three straight double bogeys and shot 43 on the back nine. He didn't get much better on the front nine and wound up with 78. That's 15 shots higher than his score on Thursday.

McIlroy said his knee was sore on the range as he was hitting balls, but that it didn't bother him once the round began. What hurt more was his inability to hit fairways. He didn't find the short grass until his eighth hole of the round.

Thorbjorn Olesen of Denmark had a 67 and was at 6-under 138 among those who finished early. Adam Scott (70) was at 139, and Phil Mickelson (70) was at 142.