Kevin Chappell wasn't even sure how he got invited to the PGA Championship this year. He sure made the most of it Thursday.

Chappell played bogey-free and made birdie on the toughest hole at Valhalla on his way to a 6-under 66. That gave him a share of the lead with Lee Westwood among those who teed off in the morning.

Chappell was surprised to get an invitation a week ago Monday. He was at No. 104 in the world, not eligible in any category. Turns out the PGA Championship thought he was close enough to the top 100 to merit an invitation.

The UCLA grad took it from there. He hit an 8-iron to 6 feet for birdie on the 496-yard second hole. He also holed a bunker shot.