Chaska, MN (Sports Network) - World No. 3 Paul Casey withdrew from the PGA Championship Thursday morning before teeing off. Casey has been suffering from a strained intercostal muscle in his ribs.
The Englishman was originally injured just before the British Open. He battled through the pain to tie for 47th at Turnberry, but tried to play last week for the first time since.
Things did not go well in Akron for the 10-time winner on the European Tour. Casey withdrew from the WGC-Bridgestone Invitational last week and delayed his decision on competing in the season's final major until Thursday morning.
Casey, who earned his first PGA Tour win earlier this year at the Houston Open, was replaced in the field by Tim Petrovic, who has four top-10 finishes on the PGA Tour this season.
Casey was the third player to withdraw from the championship, joining Robert Karlsson (eye) and Trevor Immelman (wrist) on the sidelines.
