LOUISVILLE, Ky. (AP) -- A glance at the key hole Thursday at the PGA Championship:
STROKE AVERAGE: 4.877
KEY FACTS: Rory McIlroy took a double bogey after yanking a shot out of bounds. Defending champion Jason Dufner dropped out with a sore neck after making triple bogey. Kevin Chappell, tied for the lead, holed out from bunker for birdie.