Taverez or Lester at 5, I don't think it matters. Either way, the 5 slot is the 5 slot, and either pitcher is more than capable of holding down the #5. It's more importand that the other 4 guys stay healthy. . . and papelbon.
We all knew this was going to happen. As bad as they are right now, we also all know that they'll be there battling us at the top of the division come september.