Whether the camera was taken while in the stands, or at a pre-game or post-game tailgate party, will help consider what course of action to better your odds for recovery. If in the stands, were you sitting in a predominantly Stanford section, or an USC section, or neutral. Depending on the orientation of the situation, then you may want to cast a search out in either or both campuses, and their surrounding areas. If I recall the LA Colliseum area, I would not expect any pawn or camera shop to take that item and expect to sell it locally, so I would look for online buy/sell sites. If a Stanford oriented crowd, you might want to contact Keeble & Shuchat Photography, one of the few remaining full-service professional camera retail/new/used camera stores in the Stanford and larger SF Bay area, and ask if they can put it on a check-list for used equipment coming in.
Hope you recover it.