Lowry's tee shot on the 346-yard hole was found plugged into what appeared to be a divot on the fairway. Lowry asked a rules official if he could get relief out of the divot, but was denied, meaning he had to hit his second shot with about half of the ball embedded in the ground.

Shane Lowry found more than a little mud on the eighth hole Friday at the PGA Championship. And he more than expressed his frustration. Lowry's tee shot on the par-4 landed in the fairway but finished in a pitch mark.

Mud balls and preferred lies have been a topic of discussion at the PGA Championship. Shane Lowry will certainly have opinions after Friday's round.