Canada's Graham DeLaet withdrew from the WGC Bridgestone Championship on Sunday with the flu.
He is still expected to play at the PGA Championship beginning Thursday in Louisville, Kentucky.
DeLaet opened at Bridgestone with rounds of 67 and 69 before struggling to a 76 on Saturday.
The native of Weyburn, Saskatchewan is currently ranked No. 35 in the world. He finished as the top Canadian at last week's RBC Canadian Open in a tie for seventh place.