Regular Season Champion

1987 Southern Cal
1988 Washington
1989 Stanford
1990 Stanford, Washington
1991 Stanford
1992 Stanford
1993 Stanford
1994 Southern Cal
1995 Stanford
1996 Stanford
1997 Stanford
1998 Stanford
1999 Oregon, UCLA
2000 Oregon
2001 Washington, Arizona St., Stanford 
2002 Stanford
2003 Stanford
2004 Arizona, Stanford
2005 Stanford
2006 Stanford
2007 Stanford
2008 Stanford

Conference Tournament Champion

2002 Arizona St.
2003 Stanford
2004 Stanford
2005 Stanford
2006 UCLA
2007 Stanford 
2008 Stanford