Which player do we NOT resign when the time comes for their second contract?

DeCastro
Pouncey
Warmack

If DeCastro and Warmack perform like we expect, I guarantee we won't be able to keep all three especially considering their 2nd contracts will be huge and we can't allocate all that money to just the o-line (2 being G)

Additionally, how can you wrap up all that money in two guards and a center without including a high-priced position like T (especially LT).