Overnight leader Rory McIlroy fell down the leaderboard after day three of the St Jude Classic in Memphis, Tennessee.
The Northern Irishman, who had started the day with a two-shot lead on the chasing pack, carded a round of 72 to see him slip to five-under-par.
Australian Nick O'Hern is joined at the top of the leaderboard by Americans Davis Love III and John Merrick on six-under, while Dustin Johnson is one of five players alongside McIlroy who are a shot further back.
Meanwhile, J.B. Holmes ended the day on four-under, with Padraig Harrington amongst a host of competitors on three-under.