This is a list of conference champions in sports sponsored by the Pac-12 Conference. Current members Affiliate members Former members No school has left the Pac-12 since its founding as the AAWU in 1959. Two members of the PCC never joined the AAWU. Baseball Bold text indicates National Champion * Pacific Coast Conference playoff champion ** North-South playoff champion † California won the CIBA Division 1 and USC won Division 2. Cal defeated USC in a playoff for the CIBA title. ‡ Won the tiebreaker and the automatic post-season bid Arizona State won the 1969 and 1977 National Championships as a member of the Western Athletic Conference. The Sun Devils' first baseball season in the Pac-12 was 1979. Arizona won the 1976 National Championship as a member of the WAC. The Wildcats also joined the Pac-10 for the 1979 baseball season. Arizona won the 1986 National Championship but did not win the South Division Stanford won the 1988 National Championship but did not win the South Division. The Cardinal defeated South Division champion Arizona State in the final USC won the 1998 National Championship, defeating Arizona State in the final. Neither won the South Division Oregon State won the 2007 and 2018 National Championships but did not win the conference championships for those years. UCLA won the 2013 National Championship but did not win the conference championship. Men's basketball The Pacific Coast Conference began playing basketball in the 1915-16 season. The PCC was split into North and South Divisions for basketball beginning with the 1922-23 season. The winners of the two divisions would play a best of three series of games to determine the PCC basketball champion. If two division teams tied, they would have a one-game playoff to produce the division representative. Starting with the first NCAA Men's Basketball Championship in 1939, the winner of the PCC divisional playoff was given the automatic berth in the NCAA tournament. Oregon, the 1939 PCC champion, won the championship game in the 1939 NCAA Men's Division I Basketball Tournament. The last divisional playoff was in the 1954-55 season. After that, there was no divisional play and all teams played each other in a round robin competition. From the 1955-56 season through the 1958-59 season, the regular season conference champion was awarded the NCAA tournament berth from the PCC. In the case of a tie, a tie breaker rule was used to determine