The sad reality is, who do we have as pitching depth. If we go by Weaver, CJ, Richards, Santiago, and Skaggs, who do we have if someone inevitably goes down to injury? Shoemaker didn't exactly light it up in AAA the last 3 seasons. Although his numbers are improving, a 4.64/1.31 at AAA doesn't exactly scream success at the MLB level.
My gut tells me, if Blanton is released, it won't be till after April or May. They won't press the panic button, until they know they can't get any value from Blanton, in the form of around a 4.5 ERA, 1.35 WHIP.