San Francisco's tag options

The San Francisco 49ers are looking to make a final push for 2013, so that they can go from NFC championship game losers in 2011, to Super Bowl losers in 2012, to Super Bowl winners in 2013. One way to accomplish that feat is to retain the talent from the rosters that competed throughout those tough postseason runs. Of that group, two in particular are considered candidates for the team's franchise tag this offseason.