EDIT: Didn't realize this probably included bullpen, I was just talking about starters because I just read the other thread and didn't pay close enough attention.
I'm a bit more optimistic than most people with our starting pitching. Weaver should perform like one of the top pitchers in the league, I think Wilson will rebound similarly to after the last time he had this elbow surgery and be ace caliber, giving us one of the best 1-2 punches. Vargas will be pretty good with our defense and at least be an average middle of the rotation starter. Blanton will be no worse than he has been in his career, possibly better given our defense/ballpark/being in better shape. Hanson is a huge question mark but I think Richards could be a decent #5 right now if Hanson has problems. Of course 2+ injuries could make this staff significantly worse, unless Williams steps up.
As it stands in the AL I only see Oakland, Tampa Bay, and Toronto being better than us for sure when healthy (1-2 others you could argue for) and will almost certainly outperform our staff. I predict they'll finish between 5-8th in ERA, right around the middle of the pack.