Running back
Starter: Julius Jones
Age: Turns 29 August 14.
Health: Missed games each of last two seasons, but mostly good.
Contract: Two years remaining.
Performance: Ok, but very capable of being improved upon.
Backup: Justin Forsett
Age: Turns 25 October 14.
Health: Good, but untested.
Contract: Two years remaining, plus RFA.
Performance: Good.
Depth: Louis Rankin
Age: Turns 25 May 4.
Health: Good, but untested.
Contract: Etc.
Position need: Relatively, this is not a need, but if we assume Jones is nothing special, Forsett should share carries and Rankin is best cut, this is a pretty big need too. Jones suffered a bit from bad blocking, but 29 is old for a back, and he doesn't have a lot to lose before he's bad. Seattle could survive without adding another back, but this position would then be a weakness and thin to boot.
Running back seemed like a need entering the offseason, but a luxury now. The best case scenario is that Forsett comes into his own in a major way and thrives carrying most of the load.