The teenager then claimed six amateur titles including the Irish Amateur Open Stroke Play title in 2002 before turning professional at 19 in the same year.
Wood, 23, who was the top amateur at the 2008 Open at Royal Birkdale where he finished fifth, had started the day two shots off the lead held by Oosthuizen and Austria's Markus Brier.
The Open, US Open and US Amateur champions are traditionally grouped together for the first two rounds.
BBC: Ramsay, 23, won the US Amateur at Hazeltine last August
Haas, who won the Senior PGA Championship two weeks ago, first played Winged Foot in the 1974 US Open as an amateur.
This was primarily used for Sir Patrick's own observations of the Moon and planets, but was also open to passing amateur astronomers, youth groups and anyone else who might be inspired by a glimpse of the sky.
It was also interesting to note a growing wave of amateur space enthusiasts who are creating open source satellite and guidance plans and software and even making their own back-yard rockets!
Winged Foot was designed by A.W. Tillinghast in 1923 and hosted its first U.S. Open six years later, when amateur Bobby Jones delivered one of the biggest shots in championship history with a 12-foot putt on the final hole to force a 36-hole playoff.
Wood burst on to the scene as an amateur last season with a fifth-placed finish at The Open and after turning professional came through Qualifying School to secure his place on the European Tour this term.
Wie, 15, who had hoped to qualify for the US Open, tied for first in a 36-hole Amateur Public Links sectional qualifying tournament in Pennsylvania.
Back when he was a young golfer, he got an Augusta lesson from Ken Venturi, whose accomplishments included a U.S. Open win and a Masters second-place finish as an amateur.
At East Lake Golf Club in Atlanta, former US Amateur champion Matt Kuchar shot 66 in his second round to nail one of the six Open spots on offer.
The South Korea-born Ko has two other pro victories, the New South Wales Open last year and New Zealand Women's Open this year, and won the U.S. Women's Amateur last season.
Mitchell Baker, whose after-hours pursuits include conversational Mandarin and amateur trapeze flying, sticks out more than a little in the overwhelmingly male geek church of open-source software.
Joining Dredge as a debutant in the event will be England's Kenneth Ferrie, thanks to his sixth place finish at the US Open, and Scot Richie Ramsay, the first British player to win the US Amateur since 1911.
After a good showing at The U.S. Open, Cantlay fired a 60 Friday at the Travelers Championship, the lowest by an amateur in PGA Tour history.
The enforcement agency considers the Games an amateur enterprise, even though Olympic basketball players can come from the NBA. "We feel it would open a big can of worms to determine who's professional and who isn't professional, " said Jerry Markling, the NGCB's chief of enforcement.
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