While it is not certain why this appears on TMZ's website nor how accurate TMZ is with sports related stories that don't involve an arrest or something equally embarrassing, an article there states that Donovan McNabb is refusing to go to Oakland and they are hearing that he may actually end up in San Francisco.

Take this story for what it is worth because the San Francisco front office has already stated that they are not interested in McNabb and nothing has been reported that this has changed.

Within the NFC West, the St. Louis Rams have also been reported as interested in McNabb.

Source:
http://www.tmz.com/2010/03/31/donovan-mcnabb-silver-and-blacklists-himself/