In 1973, Jerry Seltzer shut down Roller Derby and sold the promotional rights to Bill Griffiths, who immediately disbanded Roller Derby's IRDL and his own NRL, but recruited some of IRDL's star skaters to skate in an NRL successor league, the International Skating Conference (ISC), which was to focus on the Los Angeles Thunderbirds. Teams in the ISC included the L.A. T-Birds, the Eastern Warriors, and several international teams: Team Canada, the Tokyo Bombers, and the Latin Libertadores. The league also featured the San Francisco Bay Bombers in certain games, in which the storylines were built around the Thunderbirds claiming the Bombers were infringing on their territory; the Bombers continued to skate in spite of this. (This incarnation of the Bombers was also unique in that three notable veterans, Ann Calvello, Joan Weston, and Annis Jensen all skated on the same team. Jensen's daughter, Barbara Baker, also skated for the Bombers.)