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Conference realignment caused a lot of changes in collegiate sports, and it even hit the water polo level. It is a little different with water polo with various leagues like the WWPA and MPSF which encompasses schools from various larger conferences like the Pac-12.
So, to keep everyone abreast of what teams are in what league here are the changes. The big change is San Diego State and Hawaii leaving the MPSF for the Big West. The MPSF does gain Cal State Bakersfield who comes from the WWPA, but the trade off is not equal as the Big West gets tougher and the MPSF loses two solid teams.
The result on this expansion has the biggest effect on the Big West, which will now have four very good teams at the top instead of just two. That will make for a very interesting conference tournament.
MPSF
| 2012 | 2013 |
| Stanford | Stanford |
| USC | USC |
| California | California |
| UCLA | UCLA |
| Arizona State | Arizona State |
| San Jose State | San Jose State |
| Hawaii | Cal State Bakersfield |
| San Diego State |
Big West
| 2012 | 2013 |
| Cal State Northridge | Cal State Northridge |
| Long Beach State | Long Beach State |
| Pacific | Pacific |
| UC Davis | UC Davis |
| UC Irvine | UC Irvine |
| UC Santa Barbara | UC Santa Barbara |
| Hawaii | |
| San Diego State |
WWPA
| 2012 | 2013 |
| LMU | LMU |
| Cal State East Bay | Cal State East Bay |
| UC San Diego | UC San Diego |
| Cal State Bernardino | Santa Clara |
| Cal State Monterey Bay | Colorado State |
| Sonoma State | Sonoma State |
| Santa Clara | Cal State Monterey Bay |
| Colorado State | Cal State Bernardino |
| Cal State Bakersfield |