What it means: Goosen began the day as one of six co-leaders, and he now has the top spot to himself after a 1-under 70. The group of contenders is highlighted by Thomas, one of the Tour's rising stars, but established champs like Watson and Spieth lurk just three shots off the pace.
Round of the day: DeLaet still needs to play his way into the WGC-Cadillac Championship and the Masters, but the Canadian took a big step toward both goals with a 4-under 67 in the second round. DeLaet carded five birdies against just one bogey and now sits one shot off the pace heading into the weekend, still in search of his first PGA Tour win.
Best of the rest: Hunter Mahan is making just his second start since his wife Kandi gave birth to their second child, but he didn't appear to be rusty during his 67 Friday. Mahan had five birdies and an eagle, scraping his way back to even par to easily make the cut despite an opening-round 75.
Biggest disappointment: Geoff Ogilvy was on the early leaderboard after an opening-round 68, but the Aussie struggled to a 5-over 76 in Round 2. Ogilvy opened with a double bogey on No. 10, his first hole of the day, and made only one birdie all afternoon. At 2 over, he now sits eight shots off the pace.
Main storyline heading into Saturday: Goosen hasn't won since the Valspar Championship in 2009, but at age 46 he has turned back the clock through 36 holes in Los Angeles. Should the South African falter, the player to watch could be Watson, who at 3 under is looking to become the first player to go back-to-back at Riviera since Phil Mickelson in 2008-2009.
Shot of the day: Lucas Glover gave the fans a reason to cheer on the par-3 sixth hole when the veteran made a hole-in-one with an 8-iron. It was the first hole-in-one at this event since Joe Ogilvie in 2012, although despite the ace, Glover still missed the cut by one shot.