Titleist Pro V1
First used in October 2000, the Pro V1 marked a dramatic change in golf ball construction. Previously, most pros and better amateurs used balls with wound cores, but the Pro V1 offered a solid core with a multi-layer covering. The Pro V1 was an instant success: the first week it was in use, Billy Andrade used it to win the Invensys Classic at Las Vegas on the PGA Tour. Since then, the Pro V1 family of balls has accounted for over 1,700 worldwide professional victories.