South Korea's Sang-moon Bae shot six-under 65 on Friday morning to seize the second-round lead at the Northern Trust Open.
Bae is currently nine-under 133 overall and holds a one-shot lead over John Merrick, who followed his first-round 68 with a five-under 66 on Friday.
Luke Donald, the former world No. 1 who is playing his first event of the season, is seven under for 36 holes after his second-round 66.
Seemingly ageless Fred Couples, 53, a two-time Northern Trust winner who is playing this week on a sponsor's exemption, birdied his first two holes Friday and was five under through seven holes.