Former 49ers quarterback Jeff Garcia, 37, will be one of the Raiders' top priorities once the free-agency period begins tonight at 9. The former San Jose State star is regarded as the top quarterback available in free agency. His stock soared after he replaced injured regular Donovan McNabb midway through last season and guided the Philadelphia Eagles to an NFC playoff berth. The Raiders, Denver Broncos and Tampa Bay Buccaneers are expected to show the most interest in Garcia. The Eagles declined to pursue Garcia now that McNabb is expected back at full strength. ``If the Raiders call once free agency begins, Oakland definitely will be one of the places he seriously considers,'' said Steve Baker, Garcia's agent