(Los Angeles, CA) -- Joaquin Niemann is the leader of the Genesis Invitational after one round at Riviera Country Club. The 23-year-old Chilean shot an eight-under to finish three strokes ahead of the field on Thursday. Ten other golfers shot four-under or better including Jordan Spieth, Collin Morikawa, and Justin Thomas. Meanwhile, Wyndham Clark was disqualified after signing an incorrect scorecard following a six-over first round.