The 91st PGA Championship was held August 13-16, 2009 at Hazeltine National Golf Club in Chaska, Minnesota. In one of the biggest upsets in golf history, South Korea's Y.E. Yang defeated Tiger Woods by three strokes to become the first Asian-born male golfer to win a major championship. Woods had held a two-shot lead entering the final round and had been 14-0 in majors when leading after 54 holes.
The 91st PGA Championship was staged at Hazeltine National Golf Club in Chaska, Minnesota, with Tiger Woods arriving as the heavy favorite following his wins earlier that year at the WGC-Accenture Match Play, the Arnold Palmer Invitational, the Memorial Tournament, and the WGC-Bridgestone Invitational.
Tiger Woods and defending champion Padraig Harrington each opened with rounds of 5-under-par 67 to share the first-round lead at Hazeltine.
Tiger Woods followed his opening 67 with a 2-under-par 70 to reach 7-under for the championship, taking a two-shot lead over a group of contenders that included defending champion Padraig Harrington.
After a weather delay, Tiger Woods shot a 1-under-par 71 to reach 8-under-par for the tournament, preserving a two-shot lead over South Korea's Y.E. Yang, who carded a 67. Woods entered the final round 14-0 in majors when holding the 54-hole lead.
With his victory, Y.E. Yang became the first Asian-born male golfer to win one of golf's four major championships, and the first player to come from behind in the final round to defeat Tiger Woods in a major.
Y.E. Yang shot a 2-under-par 70 in the final round while Tiger Woods struggled to a 3-over-par 75, handing Yang a three-stroke victory at 8-under-par 280. It marked the first time Woods had ever lost a major championship after leading through 54 holes.
On the par-4 18th, Yang struck a 3-hybrid approach shot from 210 yards to within approximately eight feet of the pin while Woods found trouble with his own approach, effectively sealing the championship.
Yang chipped in for eagle from off the green on the par-4 14th hole to take a one-shot lead over Woods, a pivotal moment that shifted the momentum of the final round.