Updated Fantasy Football Rankings 2012, Week 1: Running Backs In Standard & PPR Leagues

A lot of news has come down in the past couple days, so let's try to reassess some of the rankings. You can check out the original rankings from Tuesday right here. It also includes older news about guys like Jonathan Stewart in those rankings, too. Here we go:

The big story came when Adam Schefter said on Twitter that Marshawn Lynch is experiencing back spasms and his status is uncertain for Sunday. Even though the Cal product said he plans to play, he has been limited in practice and has put fantasy owners in a major bind. The Seahawks get the afternoon game as they travel to Glendale to take on the Cardinals. There are 18 teams playing at 1 ET, so owners of Lynch might be forced to bench him. Similarly, Robert Turbin owners also have a tough decision on the horizon. By the way, Turbin should be owned in all competitive leagues.

The second big story is the news that Arian Foster is a game-time decision for Sunday's game with the Dolphins. Foster said he still expects to play, but this was enough to knock Foster down in the rankings to number five. If Foster does sit, Ben Tate would be an absolute must-start in even a two-man league.The good news is that the Texans play in an early game on Sunday, so owners should have the info they need when lineups are due at 1 EDT. Stay tuned to the SB Nation Fantasy War Room Sunday morning.

Also from the Cal RB department, Shane Vereen has been held out of practice with a foot injury. The second-year back had just 15 carries last year and missing practice is a strong indication that he probably won't see many touches. Danny Woodhead emerges as a player that could see some third-down snaps, but the big winner here is Stevan Ridley. There's almost no way he can be benched.

UPDATE: Vereen has been ruled out. He had little impact to begin with, so nothing really changes about the statements above.

Trent Richardson was back at practice on Thursday and also practiced on Friday. The Alabama star is expected to see carries in the high teens. The Eagles will probably put the clamps on him and his upside doesn't project to be that high.

Rashard Mendenhall is not likely going to see meaningful action on Sunday, according to Jason LaCanfora of CBS. The obvious analysis here is that Mendenhall has to be scooped in every single league. On the other hand, there's almost no way you can start him. The most promising Steeler looks to be Jonathan Dwyer. The Yellow Jacket has just 25 touches in his two-year career, so there's certainly plenty of risk in starting a player which such little experience. There is also concern over Isaac Redman's ankle. If Dwyer is the only option left, he might be someone to use as a flex in deeper leagues. Chris Rainey could be a sneaky play in leagues that reward for kickoff-return yards too.

John Elway said the Broncos will monitor Willis McGahee's workload this season. Willis owners should be aware that he's not going to get to 20 carries in almost any game. The majority of his value will come at the goal line and the probability of him hitting double-digit TDs is higher than hitting 1,000 yards. If he starts hot, owners might want to consider selling high. It also worth noting that Knowshon Moreno has been named the number two back. He has some value in deeper leagues.

Sione Pouha is out for the Jets. This is good news for C.J. Spiller and Fred Jackson.

Lastly, Mike Shanahan is still toying with us all.

Friday evening update: Beanie Wells is questionable with a hamstring injury. This doesn't change things and Beanie should be glued to your bench this week.

We have provided PPR and standard scoring rankings below, but if your league has unique scoring with things like bonuses for big plays or for hitting 100 yards, you can ask me on Twitter @MikeSGallagher.

Giants and Cowboys have been locked in to their positions. They weren't ranked terribly on my part, so there's that.

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