Daniel Chopra (67) is alone in eighth place at 11-under 133.
Zach Johnson (65), who finished third at last week's WGC-Accenture Match Play Championship, is tied for ninth place with Troy Matteson (64), Dean Wilson (68), Lucas Glover (67) and Chad Campbell (66) at 10-under 134.
The 36-hole cut fell at four-under 140. World No. 7 Jim Furyk missed it.