At the 2006 U.S. Open, played on the West course of the Winged Foot Golf Club, Montgomerie had yet another chance to win his first major championship. He stood in the middle of the 18th fairway in the final round having sunk a 50-foot birdie putt on the 17th green, which put him in the joint lead with Phil Mickelson. While waiting in position on the 18th fairway for the group in front to finish, Montgomerie switched his club from a 6-iron to a 7-iron, assuming adrenaline would kick in. Once the wait was over, he hit the approach shot poorly, ending up short and right of the green, in thick rough. He pitched onto the green, and then three-putted from 30 feet to lose the tournament by one stroke. After the loss, Montgomerie said, "At my age I've got to think positively. I'm 43 next week, and it's nice I can come back to this tournament and do well again, and I look forward to coming back here again next year and trying another U.S. Open disaster." Geoff Ogilvy won the championship.