Disclosed is a sports bag assembly with an integral wheeled transportation system. The bag assembly can accommodate the transportation and storage of sports equipment. The wheels can be deployed and retracted with a single mechanical movement, and may be stowed within the geometry of the bag. The bag assembly can fit within the recessed areas of platforms on the rear of motorized golf carts; within conventional storage stands, racks, lockers, vehicle trunks and/or hatches typically found around golf courses and in residences; and within travel containers or other systems for traditional golf bags. The golf bag assembly may also include a ventilated club storage compartment to facilitate the drying of clubs (including grips), and allow drainage of fluids which may enter the interior of the bag assembly. The bag assembly can also include a support and suspension system which restrains the grip and upper shaft or hosel ends of clubs which stabilizes and protects clubs during transport and play. The restraint system also can enhance the golfing experience by reducing or eliminating noise generated by clubs banging together during transportation. The restraint system can also extend the life of golf clubs by preventing contact between clubs, which contact could damage and alter frequency settings for various clubs.