After playing the third hole at the Oak Hill Country Club, Austin reported to tournament officials that he had 15 clubs in his bag -- one more than the rules allow. The penalty for such a violation is two strokes per hole, although the maximum number of strokes a player can be penalized is four.
When the penalty strokes were added, Austin shot a 5-under 75 in the second round for a 36-hole total of 4-over 144. He missed the cut by a single shot.
Austin picked up his fourth PGA Tour title July 21 at the Sanderson Farms Championship, a victory that put him into this week's event.
The 2013 PGA Championship was his first major tournament appearance since the 2009 PGA, in which he tied for 36th. He was the runner-up to Tiger Woods in the 2007 PGA Championship.