The PBR Ram Challenger Series is the top expansion series of the PBR. It features some of the best athletes of the sport going head-to-head with the fiercest bulls in the country. The PBR Ram Challenger Series will bring all the high-energy sound, lighting, special effects, and edge-of-your-seat action that fans have come to expect from the World leader in the sport of bull riding. Initial Listing and Description provided by Ticketmaster.