Golf - Oosthuizen withdraws from PGA Championship with suspected sore back

Oosthuizen's place in the field was taken by American Kelly Kraft.

While the PGA of America did not provide details of Oosthuizen's injury, the South African has had a history of back problems and was receiving treatment on Wednesday.

The 2010 British Open winner finished second to Justin Thomas at last year's PGA Championship at Quail Hollow.

Oosthuizen also finished second at the 2015 U.S. Open and lost the 2012 Masters in a playoff to Bubba Watson.

(Reporting by Steve Keating in St. Louis, editing by Pritha Sarkar)