The 1974–75 Seattle SuperSonics season included which former Boston Celtics center as head coach?
1974–75 Seattle SuperSonics season:  In their second season with Bill Russell as head coach and with rookies comprising half the roster, the SuperSonics finished the regular season in 4th place in the Western Conference with a 43–39 record and reached the playoffs for the first time in franchise history. Bill Russell:  Russell played center for the Boston Celtics of the National Basketball Association (NBA) from 1956 to 1969.
i don't know