Sam Saunders keeps his lead at weather-plagued Riviera

Hideki Matsuyama, of Japan, reacts after missing a putt on the sixth hole during the first round of the Genesis Open golf tournament at Riviera Country Club, Thursday, Feb. 16, 2017, in the Pacific Palisades area of Los Angeles. (AP Photo/Ryan Kang) (The Associated Press)

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Jordan Spieth tees off on the 12th hole during the first round of the Genesis Open golf tournament at Riviera Country Club on Thursday, Feb. 16, 2017, in the Pacific Palisades area of Los Angeles. (AP Photo/Ryan Kang) (The Associated Press)

Spectators walk to the clubhouse after play was suspended during the second round of the Genesis Open golf tournament at Riviera Country Club Friday, Feb. 17, 2017, in the Pacific Palisades area of Los Angeles. (AP Photo/Ryan Kang) (The Associated Press)

LOS ANGELES – Hideki Matsuyama returned to Riviera and birdied his final three holes to at least stay in range of Sam Saunders at the weather-delayed Genesis Open.

Saunders shot 64 on Thursday and finished the opening round with a two-shot lead.

The first round wasn't completed until Friday morning because of fog. The bigger threat was a huge storm system off California, though Riviera already escaped one wave of rain and wind overnight.

The second round began with players able to lift, clean and replace golf balls in the short grass because soggy conditions are expected the rest of the week.

Jordan Spieth completed his 69 in the morning. It was his 18th consecutive round under par on the PGA Tour dating to the Tour Championship last September.