The PBA Tour is the major professional tour for tenpin bowling, operated by the Professional Bowlers Association (PBA). Headquartered in Mechanicsville, Virginia, over 3,000 members worldwide make up the PBA. While most of the PBA members are Regional professionals, a small percentage of the bowling membership competes at the national and international level, forming the PBA Tour. Founded in 1958, the PBA Tour has been in continuous operation since the inaugural 1959 season.