By Mike McAllister, PGATOUR.COM

AUGUSTA, Ga. -- Five holes into his second round, Louis Oosthuizen was licking his wounds. He double bogeyed the second hole, and followed a birdie at the third with consecutive bogeys. His name was no longer on the front page of the leaderboard. It was cold and windy and nothing was going right.

But once he reached the back nine, the sun came out ... and Oosthuizen started to shine. After getting through Amen Corner unscathed, the South African posted three birdies in his final five holes to post an even-par 72 that keeps him at 4 under for the tournament heading into the weekend.

"Looked at the scores and the guys made birdies starting the first five holes, some of them were 3 under," Oosthuizen said, "and I was 3 over. So I knew I just needed to hang on."

It's a credit that Oosthuizen was able to do just that on a course in which he hasn't particularly fared well until this week. In three previous starts in the Masters, Oosthuizen had failed to make the cut, with his best round being a 1-over 73.

But the 2010 British Open winner felt good about his game coming into this week, especially after finishing third at last week's Shell Houston Open. Oosthuizen held the 54-hole lead and used that as a positive building block instead of dwelling on the lead he lost in the final round.

He used that confidence late in his round. A 9-iron off the tee at the par-3 16th left him a 4-foot birdie putt, then he used an 8-iron for his approach shot at the 17th to set up a 5-foot putt.

"I've never come into this tournament playing really well," he said. "This is probably the first one I came in feeling confident, the way i swing it and the way I'm hitting the ball. So it makes a huge difference."

And now, not only has he made the cut, he's also in good shape to claim the second major of his career.

"You know, it's a weird spot for me to be in, to be third at the moment," said Oosthuizen after glancing at the leaderboard. "I normally was busy changing tickets back home (after missing the cut)."

This year, he gets to stay a few extra days.

Dry conditions greeted the field as play resumed on Saturday at the Shell Houston Open.

Four players on the course -- Jeff Maggert, James Driscoll, Carl Pettersson and Angel Cabrera -- restarted Saturday within three shots of co-leaders Louis Oosthuizen and Brian Davis, who finished Friday at 11 under.

Updates from the second round on Saturday morning: 

12:30 p.m. ET: The second round is over, with the final cut at 2 under. The third round will begin at 12:45 p.m. ET. Round 3 tee times

11:30 a.m. ET: Jeff Maggert is officially the 36-hole leader. James Driscoll got to 11 under with a birdie on the par-5 eighth, but he parred the ninth to become the third person at 11 under. Updated tee times will be posted when available; the cut remains at 2 under.

10:45 a.m. ET: Nice bounceback for Keegan Bradley, who birdied the par-4 17th to get back to 9 under, three shots back. Carl Pettersson birdied the par-5 eighth to become the fourth player in double digits at 10 under.

10:30 a.m. ET: Jeff Maggert is the likely 36-hole lead after he wrapped up his second consecutive 66 on Saturday morning. Maggert actually got to 13 under, but he bogeyed the par-3 ninth for his first bogey of the week.

10:20 a.m. ET: Keegan Bradley bogeyed the tough par-3 16th to drop back to 8 under, five shots back. He still has to play the mammoth par-4 17th and 18th.

9:45 a.m. ET: Maggert is the sole leader at 12 under, and Keegan Bradley is making a run. Bradley reeled off three straight birdies to get within three shots of the lead.

LIVE LEADERBOARD: Shell Houston Open | Shot Tracker

PALM BEACH GARDENS, Fla. -- Louis Oosthuizen withdrew after nine holes Sunday, citing illness.

The 2010 British Open champion was 2 over at the start of the day but had a disastrous stretch on the back nine at PGA National, where he made three bogeys, three double bogeys and one birdie to shoot an 8-over 43.

This was just the second start of the year on the PGA TOUR for Oosthuizen, who lost in the second round of last week’s World Golf Championships-Accenture Match Play Championship. Up next he’ll head to TPC Blue Monster at Doral for the World Golf Championships-Cadillac Championship.

A trio of major champions -- Charl Schwartzel, Trevor Immelman and Louis Oosthuizen -- received honorary life membership on the Sunshine Tour at its annual awards dinner on Tuesday night in Johannesburg.

Schwartzel, the most recent of the three to win a major, also won the Commissioners Award for his contributions to South African golf in 2011. Schwartzel birdied the last four holes at Augusta National last April to follow Immelman as a Masters champion.

Immelman, who will get his PGA TOUR season under way at next week's Humana Challenge in partnership with the Clinton Foundation, took to Twitter to express his appreciation. @TrevorImmelman Very humbled by the Honorary Lifetime Membership awarded to me by the Sunshine Tour today. :) #fb

Oosthuizen got a head start on 2012 when he successfully defended his title at last week's Africa Open. Schwartzel will try to do the same this week at the Joburg Open.

Garth Mulroy, the 33-year-old from Durban who graduated from N.C. State, picked up the Sid Brews award as the Order of Merit champ. He is a member of the PGA TOUR in 2012.

The stage is set for the final round at Sheshan and the major players, at least the final trio, will match Saturday's cast. Fredrik Jacobson posted a 5-under 67 Saturday and will take a two-shot lead into the final round of the World Golf Championships-HSBC Champions. Jacobson pushed his lead to four shots after birdies on the 13th and 14th holes but parred in, allowing the other members of his group to gain ground. Joining him in the final group again will be Louis Oosthuizen, who is two back at 14 under, and Adam Scott at 13 under. Both players started the day one shot behind Jacobson and took vastly different paths to secure positions in Sunday's final group. Oosthuizen started slow, not getting a birdie until the fourth hole, but was bogey-free in his 4-under 68. Scott, who is looking to become the first player not named Tiger Woods to win back-to-back World Golf Championships, started with two birdies, was 3 over from holes 4-15, then closed birdie-birdie-eagle for a 3-under 69. U.S. Open Champion Rory McIlroy made the most of moving day. His 7-under 65 moved him to 12 under, tied with Lee Westwood, four shots behind Jacobson. Graeme McDowell and Martin Kaymer will enter the final round five back. FedEx St. Jude Classic champions Harrison Frazar and Xin-jun Zhang had Saturday's best rounds, each posting 8-under 64s. Zhang is joined by Paul Casey and last week's CIMB Asia Pacific Classic champion Bo Van Pelt at 10 under through three rounds. TOUR Rookie Jhonattan Vegas matched McIlroy's 7-under 65 and heads to Sunday at 9 under, tied with Ian Poulter, Hunter Mahan and Keegan Bradley. Defending champion Francesco Molinari has yet to break 70 this week and heads to Sunday's finale at 5 under, tied for 30th. Click here to read more about Saturday's third round

Fredrik Jacobson still leads at Sheshan but Louis Oosthuizen isn't going to give him much breathing room. This long birdie on the 15th brought the South African within three shots of the leader.

Fredrik Jacobson (-14) has been a constant on, or around, the top of the leaderboard throughout the third round of the World Golf Championships-HSBC Champions. He's currently two shots ahead of Louis Oosthuizen, who entered the day one back, but the names behind those two have been undergoing seismic changes. Lee Westwood and Martin Kaymer are each 4 under , 14 and 13 holes into their respective rounds, and find themselves just three back. Also in that group is Paul Casey. The four-way tie at 10 under includes Rory McIlroy and Graeme McDowell. The Northern Irishmen are 5 under and 4 under on the day with a few holes to play. Jhonattan Vegas, a TOUR rookie who won the Bob Hope Classic in January, and Harrison Frazar, who earned his maiden victory earlier this year in Memphis, are the day’s biggest movers. Vegas is finished after a 7-under 65 moved him to 9 under on the week. Frazar has bounced back from a Friday 75 to be 9 under through 16 holes in his third round. Frazar started on the back nine and had seven birdies, one bogey and one par to turn at 6 under. He’s alternated pars and birdies on his first seven holes on the front nine.

Fredrik Jacobson is your 36-hole leader at the World Golf Championships-HSBC Champions. The Swede tied the event’s two-round scoring record, posting an 11-under 133 mark after Friday’s 6-under 66 at Sheshan International Golf Club. Louis Oosthuizen (63) and Adam Scott (65) gained ground on Jacobson, and enter the weekend just one shot off the pace. They will be grouped with Jacobson Saturday, teeing off at 10:40 p.m. ET. First-round leader Keegan Bradley had two bogeys, two birdies and an eagle Friday and enters the weekend two back. Bo Van Pelt, who won last week’s CIMB Asia Pacific Classic, and Paul Casey are each 8 under, three behind Jacobson. Defending Champion Francesco Molinari carded his second-consecutive 2-under 70 and is tied for 22nd, seven shots off the pace. Click here to read more about Round 2

ST. SIMONS ISLAND, Ga. – Things are getting crowded at Sea Island. Michael Thompson, who entered Sunday alone atop the leaderboard at 13 under, has been tied by Billy Horschel after a 9-foot birdie conversion on the first hole. Webb Simpson, a two-time winner this year chasing the money list lead, also birdied No. 1 to reach 12 under. Tervor Immelman has two pars today and is 11 under, two back, while Louis Oosthuizen is 1 under through four and 10 under on the week.