Argentina's Angel Cabrera carded a five under par 67 to move within a shot of the lead at the Quail Hollow Championship.
The two-time Major winner moved to seven under par, one behind leader Billy Mayfair, after mixing five birdies, two bogeys and an eagle three at the seventh.
Colombian Camilo Villegas remains five under after a 72, one ahead of Australia's Geoff Ogilvy.
Australian Robert Allenby is a shot further back on three under, one ahead of former Masters Tournament winner Trevor Immelman.
Padraig Harrington and Anders Romero were amongst the group on level par at the halfway stage in North Carolina.
