The Seahawks have signed 27-year old RB Michael Robinson.  Robinson played in 15 games (0 starts) for the 49ers last season and he had 3 carries for 2 yards (0.7 ypc).  He also caught 6 passes for 24 yards (4.0 ypc) last season.  Robinson has now played in 62 games (2 starts) in his four years in the NFL and he has carried the ball 86 times for 289 yards (3.4 ypc) with 2 TD runs.  He has also caught 43 passes for 346 yards (8.0 avg) in his NFL career.  Robinson will likely be the #4 RB in Seattle behind Justin Forsett, Leon Washington and Julius Jones in 2010.