Bobby Jones Bracket
• No. 1 Lee Westwood def. No. 64 Henrik Stenson, 3 and 2. The world's top-ranked golfer was erratic, with three bogeys on the first seven holes, but Stenson stumbled as well at 5-over par.
• No. 32 Nick Watney def. No. 33 Anthony Kim, 5 and 4. It was a daylong struggle for Kim, who did not have a birdie and was eliminated after 14 holes.
• No. 49 K.J. Choi def. No. 16 Retief Goosen, 1 up. Choi did not take his first lead until the 16th hole, closing out the two-time U.S. Open champ, who made a bogey at the 18th green.
• No. 48 Ryan Moore def. No. 17 Francesco Molinari, 3 and 1. Despite three birdies on the back nine and no bogeys, Molinari couldn't make up any ground on Moore.
• No. 57 Matteo Manassero def. No. 8 Steve Stricker, 2 and 1. Trailing by a hole at the nine-hole turn, the 17-year-old Italian took advantage of Stricker's three-bogey back nine to post a big upset.
• No. 25 Charl Schwartzel def. No. 40 Ryo Ishikawa, 20 holes. Costly bogeys for the Japanese teenager at No. 17 and on the second extra hole cost him the match, despite four birdies and an eagle.
• No. 9 Luke Donald def. No. 56 Charley Hoffman, 6 and 5. Donald was plus-seven after the 10th hole, then won at the 13th green.
• No. 24 Edoardo Molinari def. No. 41 Martin Laird, 3 and 2. With seven birdies, the Italian built a three-hole lead after the 13th hole to win without pressure.
Ben Hogan Bracket
• No. 4 Phil Mickelson def. No. 61 Brendan Jones, 6 and 5. Mickelson had only three birdies. But Jones struggled, finishing at 5-over par through 13 holes.
• No. 29 Rickie Fowler def. No. 36 Peter Hanson, 1 up. Fowler didn't trail in a tight match, and he did not lead by more than one hole at any time. He won with a par at No. 18.
• No. 13 Matt Kuchar def. No. 52 Anders Hansen, 22 holes. In one of the day's top rallies, Kuchar was 2-down through 16, and got even with mere pars, winning with a birdie on the 22nd hole.
• No. 45 Bo Van Pelt def. No. 20 Louis Oosthuizen, 2 up. After opening with 11 pars, Van Pelt advanced when Oosthuizen imploded with bogeys at Nos. 16 and 17.
• No. 5 Graeme McDowell def. No. 60 Heath Slocum, 4 and 3. It was a breeze for the defending U.S. Open champ, winning five holes in a seven-hole stretch as Slocum posted five bogeys.
• No. 37 Ross Fisher def. No. 28 Robert Allenby, 4 and 3. With a three-birdie rally at Nos. 11, 13 and 15, Fisher ousted Allenby, who had just one birdie all day.
• No. 53 Stewart Cink def. No. 12 Ian Poulter, 19 holes. Cink rallied from two-down at No. 14, winning with a birdie on the first extra hole as the defending champ lost his lead with a bogey at 17.
• No. 44 Y.E. Yang def. No. 21 Alvaro Quiros, 20 holes. The 2009 PGA champion didn't play especially well, with bogeys at three of the first seven holes, but Quiros struggled as well.
Gary Player Bracket
• No. 2 Martin Kaymer def. No. 63 Seung-yul Noh, 7 and 6. In the quickest match of the day, Kaymer played even-par golf, but Noh was 4-over.
• No. 34 Justin Rose def. No. 31 Zach Johnson, 2 and 1. Rose survived a double bogey at 14 and bogeys at 10 and 12 to send Johnson packing after a bogey at 17.
• No. 15 Robert Karlsson def. No. 50 Hiroyuki Fujita, 5 and 3. Fujita self-destructed in midround, tacking up bogeys at Nos. 7, 9 and 10 to fall back by two holes and not recover.
• No. 18 Hunter Mahan def. No. 47 Sean O'Hair, 4 and 3. Never trailing, Mahan pulled away with four birdies between the No. 9 and No. 15 holes to send O'Hair home.
• No. 7 Rory McIlroy def. No. 58 Jonathan Byrd, 4 and 2. Never trailing, McIlroy eagled the No. 4 hole and had birdies at Nos. 2, 8 and 11.
• No. 39 Ben Crane def. No. 26 Adam Scott, 4 and 2. A birdie at the first hole gave Crane a lead he didn't relinquish. He closed the match with three birdies.
• No. 55 Ryan Palmer def. No. 10 Jim Furyk, 2 up. It's difficult to imagine the ex-Arizona Wildcat playing worse; Furyk was 8-over par with double bogeys at Nos. 7 and 8.
• No. 23 Miguel A. Jimenez def. No. 42 Yuta Ikeda, 2 and 1. It took some clutch play by Jimenez, who had birdies at Nos. 13, 14 and 16 to rally after the 12th hole.
Sam Snead Bracket
• No. 62 Thomas Bjorn def. No. 3 Tiger Woods, 19 holes. Bjorn held up to the pressure, playing the final 13 holes in 2-under par without a bogey as Woods self-destructed with a wild tee shot in sudden death.
• No. 30 Geoff Ogilvy def. No. 35 Padraig Harrington, 4 and 3. The 2009 champ led from start to finish, taking advantage of Harrington's 3-over par and no birdies.
• No. 51 Mark Wilson def. No. 14 Dustin Johnson, 19 holes. The long-hitting Johnson saw his 2-up lead fizzle after 15 holes as he made bogey at No. 16 and on the first hole of sudden death.
• No. 19 Bubba Watson def. No. 46 Bill Haas, 3 and 2. The long-hitting Watson had the day's best start - three straight birdies - to grab a two-hole lead from which he breezed to a victory.
• No. 6 Paul Casey def. No. 59 Richard Green, 19 holes. The finalist a year ago couldn't get any cushion, never leading by more than one hole at any time, even though Green had five bogeys.
• No. 38 Jason Day def. No. 27 K.T. Kim, 3 and 2. When you birdie six holes and eagle another, in just 16 holes, you move on, as Day did on Wednesday.
• No. 11 Ernie Els def. No. 54 Jeff Overton, 19 holes. The Big Easy had one of the day's top comebacks, rallying from a 3-hole deficit through six holes to win, even though he didn't have a birdie over the last 11 holes.
• No. 22 J.B. Holmes def. No. 43 Camilo Villegas, 4 and 2. The last man in the field, an injury replacement, was 6-under par with an eagle at No. 13.