As you and the others said, Blalock is not the best answer at 3B, but your hitting is very strong in every other position, so that wont hurt you, but the glaring lack of thievery will. Less than 60 SB will get you a loss for sure about every week.
Blalock is a come back candidate this year IMO.
Your pitching is average. I dont think that Prior will be able to do anything positive this year, but he is a high reward guy. Still midseason pickups can turn this staff into one of the best.
I would drop Wigginton, he wont see much playing time in your team for sure , and probably will stay on the wire , since this is a 10 team league with no CI or MI, and another starter could get you some much needed help, or snatch a basestealer. Check Ryan Theriot or Michael Bourn on the wire.Heres some advice
Im not into holds but I think the two guys you have will do fine, but Im not sure about your closers. They are not really locks. (Im into the Ryan project too, though)