The oldies market in San Diego has never been programmed properly. But even if it were it is not a demo that companies are excited to jump on.
Due to 105.7's extremely poor signal, if an oldies station were positioned right (and not named after a nasty smelly animal), with the Johnny Mann jingles (basically a carbon clone of KRTH 101.1) then the Walrus could be destroyed, then we would have an FM simulcast of a sports station again.
But LF/JP has a bad taste in their mouth for oldies/classic hits due to VERY bad PDs at KBEST ruining the station. By the way John it didnt go from KBEST to FM 94.9 it was an 80's station for about a year or two ran by Mike Bushey.