Ernie Els took 70 for three under with USPGA champion YE Yang at two under.
He also finished second to Australian Steve Elkington for the 1995 USPGA at Riviera.
BBC: Ramsay, 23, won the US Amateur at Hazeltine last August
And the 2005 USPGA champion also revealed that he has become a vegetarian to aid his recovery.
Mickelson, Woods and USPGA champion Martin Kaymer all have a chance to take Westwood's number one spot this week.
But former USPGA champion Micheel got back to all square with some solid golf and was one up after 18 holes.
In fact, over the last 50 years there have been 22 players who can count the USPGA as their only major.
In addition to his Masters triumph, Floyd won the USPGA Championship in 1969 and 1982 and was US Open champion in 1986.
But McDowell will take up a USPGA Tour card, though he has pledged to compete for the European money list as well.
Italian brothers Edoardo and Francesco Molinari formed another pair, while world number four Lee Westwood teamed up with USPGA champion Martin Kaymer.
The US-based Englishman finished 13th at the 2004 USPGA but will need to make a marked improvement on his opening 74 at Baltusrol.
The 40-year-old American, who will attempt to win his fifth major at this week's USPGA Championship, said treatment for the disease is working.
No-one can argue with Vijay Singh's credentials - his win at the Deutsche Bank Championship was the USPGA champion's sixth title of the year.
BBC: So the world rankings have caught up with popular opinion.
Masters champion Mike Weir lies second on level par, with Open champion Ben Curtis one over and USPGA winner Shaun Micheel two strokes back.
Others to qualify included the Australian trio Steve Elkington, who beat Colin Montgomerie in a play-off for 1995 USPGA, Rod Pampling and Mathew Goggin.
World number two Vijay Singh, US Open champion Michael Campbell and USPGA winner Phil Mickelson are also among the field at Sheshan International Golf Club.
No European has won the USPGA since Scot Tommy Armour in 1930, though Garcia, Montgomerie and Nick Faldo were all runners up in the 1990s.
Thirteen years after he lost a play-off for the USPGA Championship to Mark Brooks at Valhalla, the American can now become the oldest champion in major history.
Mickelson has won two Masters and a USPGA title and his next chance for a US Open breakthrough will come next year at Pebble Beach in California.
Despite having missed out in play-offs at the 1994 US Open and 1995 USPGA, the Scot said that was the only tournament where he "really messed up".
Maybe one of the reasons why the USPGA had failed to make a dent on the European consciousness was the lack of a winner from this continent.
Also among those who failed to qualify were South Africa's Trevor Immelman, Swede Jesper Parnevik, Australians Aaron Baddeley and Peter Lonard and 1986 USPGA champion Bob Tway.
Ben Crane (65) was third on seven under with a quartet of players one stroke further back, led by former Open and USPGA champion John Daly (65).
When Azinger took over he persuaded the USPGA to revamp the qualification process to base it exclusively on money earned, with more weight on the four majors.
Last year Mickelson, who has won two Masters and a USPGA title, finished 11 shots behind tournament winner Graeme McDowell, who will be back to defend his title.
The Spaniard probably needs to finish in the top three at the USPGA to have any chance of playing his way on to the European Ryder Cup team.
Harrington insisted he is in a different frame of mind to when he played those Valhalla matches, which followed his wins in the 2008 Open and USPGA Championship.
Woods sits 10th in the United States Ryder Cup list and will miss out on automatic selection unless he performs well enough at this week's USPGA Championship in Wisconsin.
Kaymer sank seven birdies and just one bogey to seal his third straight strokeplay victory, following his victories at the USPGA Championship in August and September's KLM Dutch Open.
He is two months older than Julius Boros was when he captured the 1968 USPGA title, and two years older than Jack Nicklaus when he won the Masters in 1986.
"It'll be considerably tougher than a weekly USPGA Tour event just because of the firmness of the greens, the narrowness of the fairways and the length of rough, " he said.
BBC: Pinehurst's No.2 course also hosted the US Open in 1999
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