Having carded an opening round of 76 on Thursday, the 43-year-old suffered further turmoil on Friday after hitting a triple-bogey on the par-three 12th to miss the weekend for the first time since 1997.
"Why couldn't I get it going? You know, I don't really have a great answer for you," he told reporters.
"I've actually played reasonably well for a majority of the holes and then the ones that I let slide I end up making a big number. So it's tough to overcome those big numbers.
"What happened at 12 was I hit in the front bunker. And there was no sand where I was at. I caught the liner of the bunker and bladed it across the green and the same thing happened on the other side."