Gary Woodland and K.J. Choi each shot a 5-under-par 67 on Friday to share the second-round lead in the PGA Tour's Farmers Insurance Open in San Diego.
Woodland played the South Course and Choi the North Course at Torrey Pines, finishing 36 holes at 9-under 135.
Phil Mickelson missed the cut after finishing his round with three consecutive bogeys on the North Course. A 4-over 76 left Mickelson at 1 over, two shots behind the cut line of 1 under.
Defending tournament champion Jason Day, who is ranked No. 2 in the world, also didn't make it through to the weekend. Day followed an opening 72 with a 74 and was at 2 over.
Rickie Fowler joined Mickelson and Day with the weekend off. He carded a 71 and was at par after two rounds, failing to make the cut by a stroke.
Woodland, who has two tour victories, began the day with five birdies on his first nine holes but bogeyed three holes on the back nine before capping the round with a birdie on the par-5 18th hole. He is 9 under par on the par-5 holes during the first two days.
"I am confident on this golf course," Woodland said. "I've played well here the past couple of years. I'm excited about the weekend."
Choi, an eight-time tour winner seeking his first victory since 2011, posted seven birdies and two bogeys. He has finished in the top 10 in the tournament two of the past three years.
"This week my iron play and putting is much better than last week," Choi said.
Johnson's bogey-free 66 tied the low score in the tournament's first two days. He started with six consecutive pars before getting birdies on four of the next five holes.