The Controversy Surrounding Rory’s Illegal Driver
← Golf Gameplay & Rules | Advanced Golf Rules and Situations BLOCKQUOTE_0 Quick Answer Rory McIlroy’s driver was deemed non-conforming because its face exceeded the legal Coefficient of Restitution (COR) limit, essentially being too “springy.” This COR limit is a critical rule in golf, designed to maintain fair competition and prevent technology from overshadowing skill….