See Woo Kim is on top of the leaderboard heading in to the final round of the Valero Texas Open.
The South Korean is a shot ahead of Canada's Corey Conners while Charley Hoffman is two shots back.
Meanwhile Scott Brown, Jhonattan Vegas and Kyoung-Hoon Lee are four shots off the pace.
The winner of the tournament will secure the last spot in next week's Masters tournament.
The final round gets underway later on Sunday.

Mac Allister heads Liverpool to Champions League win over Real Madrid
Sabalenka overpowers Pegula, Gauff eliminates Paolini in WTA Finals
Pakistan win ODI against South Africa in last over as Salman shows the way
David Beckham knighted for services to sport and charity
Aryna Sabalenka challenges Nick Kyrgios in Dubai showdown
