Abstract: A trailer adapted to be towed by a prime mover supports at least one batting platform adapted to be stood upon by baseball players, one in each of a plurality of batting areas. A plurality of pitching machine, supported by the prime mover positioned a distance from the batting areas, the prime mover being positioned to project a plurality of baseballs into the batting areas to permit hitting of the baseballs by the players. A structure including poles and cables supports a flexible material around at least the batting areas to provide an enclosure for restraining to a limited area the baseballs pitched by the machine and hit by the players. The batting areas can be transversely aligned at one end of the trailer in which case the pitching machine is positioned in proximity to the other end of the trailer. The batting areas can also be aligned along the length of the trailer in which case the pitching machine is positioned laterally of the trailer.