LOS ANGELES — Dustin Johnson made six birdies Thursday on a warm, sunny day at Riviera for a 5-under-par 66, giving him a one-shot lead in the Northern Trust Open when the opening round was suspended by darkness.

Jimmy Walker birdied his last three holes and was in the large group at 67 that included Francesco Molinari of Italy and Torrey Pines winner Scott Stallings.

Four days ago, Johnson closed with a 66 in the gray, cold weather of Pebble Beach to finish one shot behind Walker. In conditions that could not have been any different, Johnson made birdie on all of the par 5s at Riviera and had only one bogey.

Jim Furyk, Keegan Bradley and Rickie Fowler were among those at 68.

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Seattle native Fred Couples had a lost ball on his second shot at No. 11 and made double bogey. But he rallied with two birdies and then made bogey on the final hole for a 72. Couples is playing the Northern Trust Open for the 32nd time.

Former Husky Richard H. Lee and Ryan Moore of Puyallup both shot 69. Michael Putnam of University Place had a 71. Kyle Stanley of Gig Harbor shot a 75.

Other tournaments

Suzann Pettersen of Norway birdied her last three holes for a 6-under 66 and a one-stroke lead in the Women’s Australian Open in Melbourne. Americans Jessica Korda and Jaclyn Sweeney were a stroke back along with South Korea’s Hee Young Park and France’s Marion Ricordeau.

• Portugal’s Ricardo Santos shot a 9-under 62 to take a two-stroke lead after the first round of the Africa Open in East London, South Africa.