Yeah, I feel comfortable with our backups. Surprisingly, our strength of depth might be on the O and D lines. We can withstand injuries, even multiple injuries, on each line and it wouldn't totally ruin us.
Parnell can fill in for both tackles. Bern for both guards. Costa for Fred.
Hayden can fill in for both DTs. Selvie for both DEs.
I don't think we can withstand injuries at any other position group. We saw what happened last season when Sean Lee and Bruce Carter went down. If Carr went down, our secondary would suffer big time. Same with Church. Then you look at Dez, Witten and, God forbid, Romo.