Sullivan finished 9-under par at Brookside Golf Course, shooting rounds of 59-70. The 59 was only 7-under par as Hole No. 8 was out of play due to course damage.
Sullivan defeated Alex Resurreccion of Los Angeles, Calif., on the second playoff hole to claim the title. Resurreccion finished runner-up.
Brandon McDonough of Santa Monica, Calif., finished in solo third place at 6-under, and Mason Chiu of San Marino, Calif., finished in solo fourth place at 5-under.
