SEA hasn't been losing at home. That's the tipping point for them as far as I am concerned.
We know Romo has to miss a minimum of 4 more games (against NYG, SEA, PHI, and TBB). I see them only beating TBB. That would already be 6 losses. If Romo comes back in Week 11 against MIA, DALS still has to play a stretch at GB, the Jets at home, and at BUF. I think they lose two of those, which would give them 8 losses (without even considering any of their other games).
MIN has a really tough last 7 game stretch (GB x 2, ATL, SEA, ARI, NYG in there). I would guess 6 losses out of that (again, ignoring the rest of their schedule). That's already 8 losses.
STL already has 3 losses and most likely will be underdogs against SEA, CIN, and ARI. They are more up and down than a lot of other teams, so who knows how they will do against lesser opponents. They might be the most likely of the DAL / MIN /STL options to get 9 wins.