The San Francisco 49ers are near the top of nearly every preseason power ranking you can find entering 2013, an expectation that matches the team's collective mentality: Super Bowl or bust.
After losing the NFC Championship two years ago and subsequently falling short last season in Super Bowl XLVII, the expectations surrounding this team are well-deserved. However, for several 49ers players, there's a lot to lose or gain in terms of personal standing on the roster moving forward.
A disappointing finish to the season could open the door for a changing of the guard in San Francisco, with several key players under pressure to step up. With both contract status and performance in mind, there are plenty of 49ers fighting for their future in Red and Gold.
Mostly considering expiring contracts, these five players have the most riding on their individual performances in 2013.
All contract information referenced in this article, unless otherwise noted, can be attributed to Spotrac.