CHICAGO (AFP) - Former US Open champion Jim Furyk, who withdrew from the BMW Championship after six holes, has been diagnosed with a bone contusion on his left wrist, the Golf Channel reported late Friday.

The 45-year-old American is ninth in FedExCup standings and assured one of the top 30 spots in next week's Tour Championship. However, Friday's diagnosis throws into doubt whether he can play in Atlanta and in the Presidents Cup.

Furyk shot 59 at Chicago's Conway Farms Golf Club two years ago. It is the first time he had to withdraw from a tournament since 1995.

If the 2010 FedExCup champion is unable to play in the Oct 8-11 Presidents Cup in South Korea, United States captain Jay Haas would get to make another pick to replace him.

Furyk had 12 top-10 finishes in 16 appearances in the Chicago event, which started out as the Western Open. He posted a two-stroke win over Tiger Woods in the 2005 Western Open.

Furyk registered his first, and so far only, Major championship win at the 2003 US Open.