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.

Lowry lost his cool after not receiving free relief from a pitch mark Friday at the PGA Championship – and he later explained that it was because of a member of the broadcast team.

Clark gets relief as ball lands in own pitch mark During Golf Channel’s coverage, as Clark was wrapping his round, in-booth rules official Mark Dusbabek further explained the situation, saying the ...