Thongchai Jaidee, who recorded the tournament's first hole-in-one this week when he aced the par-3 fifth hole with an 8-iron from 180 yards, said it was the 10th hole-in-one in his career and the eighth in competition.
"You need some luck," Jaidee said after finishing his 3-over 74 Saturday. "Today, we got lucky on that hole.
In the second round, Jaidee eagled the par-4 third. At 10 over for the tournament, he's not in a position to win, but he's got a couple of nice consolation prizes with the eagle and the ace.
"Very good memory for me," he said.
It's the 41st ace in U.S. Open history, although the USGA acknowledges that holes-in-one records are not available for all years.
The last ace at a U.S. Open came in 2006 when Peter Hedblom aced the third hole in the third round at Winged Foot.
ACES IN U.S. OPEN SINCE 2000
| Player | Year | Round | Hole | Course |
| Todd Fischer | 2000 | 2 | 7th | Pebble Beach |
| Phil Mickelson | 2001 | 2 | 6th | Southern Hills |
| Olin Browne | 2001 | 4 | 11th | Southern Hills |
| Shigeki Maruyama | 2002 | 2 | 14th | Bethpage Black |
| Andy Miller | 2002 | 4 | 3rd | Bethpage Black |
| Scott Hoch | 2002 | 4 | 3rd | Bethpage Black |
| a-Spencer Levin | 2004 | 1 | 17th | Shinnecock Hills |
| Peter Jacobsen | 2005 | 3 | 9th | Pinehurst |
| Peter Hedblom | 2006 | 3 | 3rd | Winged Foot |
| Thongchai Jaidee | 2010 | 3 | 5th | Pebble Beach |
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