Sullivan is a familiar name in Southern California, having found much success on the SCGA circuit. Most recently, he won the 2017 SCGA Mid-Amateur. He won the second of two Pasadena City Amateur titles in 2016.
The leaderboard remains crowded after the top two men. Three players are tied for third at 1-under 71, including David Ober of Riverside, Calif., Patrick McOsker of Redondo Beach, Calif., and Tim Lawlor of Los Angeles.
Tim Hogarth, who has won nine L.A. City Amateur titles, is part of a five-way tie for sixth at even-par 72.
