Description Available in: The Vegas Vipers were a professional American football team based in Las Vegas, Nevada. The Vipers competed in the XFL football league. The team was founded by Vince McMahon's Alpha Entertainment as the Tampa Bay Vipers and were owned-and-operated by Dwayne Johnson’s Alpha Acquico. The Vipers had a franchise regular season record of 3-12 (.200), the worst win percentage among all XFL teams.