1959: UCLA, USC, & Washington
1960: Washington
1961: UCLA
1962: USC
1963: Washington
1964: Oregon State & USC
1965: UCLA
1966: USC
1967: USC
1968: USC
1969: USC
1970: Stanford
1971: Stanford
1972: USC
1973: USC
1974: USC
1975: California & UCLA
1976: USC
1977: Washington
1978: USC
1979: USC
1980: Washington
1981: Washington
1982: UCLA
1983: UCLA
1984: USC
1985: UCLA
1986: Arizona State
1987: UCLA & USC
1988: USC
1989: USC
1990: Washington
1991: Washington
1992: Stanford & Washington
1993: Arizona, UCLA, & USC
1994: Oregon
1995: USC & Washington
1996: Arizona State
1997: UCLA & Washington State
1998: UCLA
1999: Stanford
2000: Oregon, Oregon State, & Washington
2001: Oregon
2002: USC & Washington State
2003: USC
2004: USC