The Redskins have released 30-year old RB/KR Rock Cartwright.  Cartwright played in all 16 games for the Redskins last season in which he carried the ball 64 times for 228 yards (3.6 ypc) and he also caught 27 passes for 242 yards (9.9 avg) with 1 TD grab.  Cartwright also returned 39 kickoffs for 868 yards (22.3 avg) last season.  Cartwright played in 123 games in his 8 years with the Redskins in which he carried the ball 215 times for 889 yards (4.1 ypc) with 6 TD runs and he also caught 59 passes for 555 yards (9.4 avg) with 2 TD grabs.  Cartwright also returned 222 kickoffs for 5,332 yards (24.0 avg) with 1 TD return for the Redskins.  With his dual role at RB and on special teams, Cartwright might be hard to replace.