If the Seattle Seahawks and Marshawn Lynch can ink a long-term contract, then Seattle essentially has their starting running back for the next 4 or 5 years barring a major setback or injury.
Finding a starting running back isn't the problem for this team. The problem is the lack of depth at the position.
Justin Forsett is a lovable little scat back who is good in passing situations but, unfortunately, isn't very productive and has shown he is very easy to take down (although we might be spoiled a bit with Lynch). Washington is a decent option when Lynch needs a breather, but at heart, he is a return specialist, and a very good one at that.
While these two can hold down the fort in the short haul, in the long run, Lynch does need a credible running back who can take some of the pressure off him.
The best way to solve this problem will likely be the 2012 NFL draft. Seattle likely won't use an early-round draft pick on a running back, it'll be more likely in the fourth, maybe third, round that we'd start hearing whispers of a running back. So let's look at the best options Seattle has.