It's been an erratic start for many of the players atop the 2011 PGA Championship leaderboard on Sunday. The one player who has yet to drop any strokes is Jason Dufner, and he is therefore alone in first place at 7-under through four holes. Keegan Bradley and Scott Verplank are tied for second at 6-under, and Brendan Steele has dropped to 5-under.
Bradley birdied the first hole to tie Dufner for the lead, but then bogeyed the par-four third hole to fall one shot back. Steele, meanwhile, began the day tied for the lead, but bogeyed the first hole, then bogeyed the par-three fourth after hitting the ball wide of the green.
Verplank is the only member of the leaderboard that has improved, hitting a birdie on the second hole to jump up to 6-under.