Commentators for the original "NBA on ABC" included play-by-play announcers Keith Jackson and Chris Schenkel, and analysts Jack Twyman, Bob Cousy and Bill Russell. On April 8, 1967, a strike by the American Federation of Television and Radio Artists (AFTRA) forced ABC Sports producer Chuck Howard and director Chet Forte to call Game 4 of the Eastern Conference Finals between Boston Celtics and Philadelphia 76ers, as its regular announcing team were members of the union. Curt Gowdy also served on play-by-play for half of the 1967–68 season.