THE WOODLANDS, Texas — Zachary Olsen eagled his final hole for an 8-under 64 and a one-stroke lead Wednesday after the first round of the Southern Amateur.

The 19-year-old Olsen, from Memphis, Tenn., will be a freshman at Oklahoma State.

Georgia Tech senior Ricky Werenski and 40-year-old Las Vegas developer Kevin Marsh were tied for second on the Nicklaus Course at The Club at Carlton Woods.

The winner will receive a spot next year in the PGA Tour's Arnold Palmer Invitational.