I'm new at this and notoriously lousy at picking starters, but you might want to reconsider sitting Thomas Jones.
This is from a column on sportsline:
"Thomas Jones, Chicago: On the surface, it would appears Jones isn't the most favorable option this week. The loss of QB Rex Grossman for the season scars the offense, and this week's opponent -- the Washington Redskins -- is one of the better teams in the league against the run. But the 'Skins enter this contest with several injuries that make Jones much more attractive. SS Matt Bowen (knee) is out for the season, LB Micheal Barrow (knee) and DT Phillip Daniels (groin) are out, and LB Lavar Arrington (knee) and DT Joe Salave'a are questionable. Bears coach Lovie Smith is certain to attack this patchwork unit with 20-25 carries for Jones, who should rush for 100-plus yards and find the end zone at least once."
I think the status of Reuben Droughns is still somewhat of a mystery. Shanahan will surely get him some carries after last week, but no one seems to know how much time will be split with Quentin Griffin.
(OTOH, I sat Droughns on the bench last week, and lost a game that I would have won if I'd played him.)