I followed him for the first 36 holes at Pinehurst in 2005, saw every shot. He was basically flawless. He hit this tight little draw all day. I swear if he had putted as straight as he hit it the first day he would've shot 64. I'm still shocked he played as poorly on Sunday as he did. He was so good that Thursday and Friday, it was (and still is) hard to believe.
And it doesn't seem as though he's recovered since. Any stat-geeks wanna see what his record has been since? I haven't looked, but my guess is pretty poor, at least a significant drop from where he was before then.