Padraig Harrington wins the 90th PGA Championship

It was the first major championship contested at Oakland Hills in twelve years, since the 1996 U.S. Open, won by Steve Jones.

The PGA Championship returned to "The Monster" for the first time in 29 years; the 1979 event was won by Australian David Graham.

The 2008 event was won by Pádraig Harrington, his second consecutive major championship and third major overall. His three under par 277 was two strokes better than runners-up Ben Curtis and Sergio García. Harrington earned $1.35 million for the victory, and became the first European-born winner of the PGA Championship in 78 years, a feat last accomplished in the match play era by Tommy Armour of Scotland in 1930. Harrington is the first winner of the PGA Championship from Ireland, and the first European to win the Open Championship and the PGA Championship in the same year.

Tiger Woods, the two-time defending champion, did not compete due to rehabilitation for a season-ending knee surgery following his playoff victory in the U.S. Open.