There have been six players in NFL history to rush for 2000 yards in a single season. 

OJ Simpson did it in a 14 week season in 1973.  In 1984 Eric Dickerson hit the magic mark.  But what is amazing is that in the pass happy modern-day NFL that we've had 4 men hit 2000 since 1997!  Barry Sanders, Terrell Davis, Jamal Lewis, and last season, Chris Johnson. 

I think that is pretty remarkable in an era that features 3, 4, and 5 wide reciever formations routinely, we've seen 4 guys rush for that many yards. 

Could we see it again in 2010?  Here are the top candidates:

Chris Johnson.  He has that extra gear that makes a big difference.  He turns 20 yard gains into 50 yard touchdowns.  Those add up over the course of a season.  He returns with basically the same team around him intact giving him a real chance to be the first player with two 2000 yard seasons under hit belt.

Adrian Peterson.  His yards were down last season, but so were his carries.  The Vikings no longer have Chester Taylor to steal carries, and AD still has break your neck power and breakaway speed that can get him in the neighborhood of 2000.

Steven Jackson.  He keeps cranking out impressive seasons with no passing attack and no weapons around him.  He's talented enough to have a shot.

Shonn Greene.  Laugh if you want, but his own health might be his biggest obstacle.  Thomas Jones, old and slow, managed 1400 last year in a run-first attack.  Greene is young and fast.  He could have a real chance behind that Jets offensive line and better passing game.

Frank Gore.  He certainly showed he can turn a short run into a long gain last year going for two 80 yard runs against Seattle, the first to accomplish that in a game since Barry Sanders.  He just has to stay healthy.  The Niners offense features him and should be much better this year.

Jamal Charles.  I doubt it, but he does have the great speed that made him a fantasy beast down the stretch.  Averaged almost 6 yards a rush last year!  Of course, now he also has competition in Thomas Jones.

DeAngelo Williams or Jonathon Stewart.  Both guys are terrific in their own right, but they chop each others stats in half.   They each averaged over 5 yards a carry last season.   If one goes down, or away, then the other would have a chance.

Felix Jones.  The super dark horse because of his situation and injury history.  He did rip off 5.9 per carry last year and is a home-run threat each time he touches it, but will he ever get to, or earn the right to touch it more.