Is it realistic for other teams to expect the Sox to keep him on the 25-man? That's the only way he has trade value because he is out of options, and anyone interested in him could gamble that he doesn't make the 25-man and pick him up once the Sox put him on waivers, which they'd have to do to send him to AAA. They'll likely start the season with a 12-man staff, which would look like this:
Starters (5): Schilling, Beckett, Matsuzaka, Papelbon, Wakefield
Relievers (7): Timlin, Donnelly, Tavarez, Okajima, Romero, Pineiro, ????
???? could be Snyder, but given the hit or miss nature of this BP, and if he keeps pitching well, I'm thinking that guy needs to be MDC. Who knows, maybe Timlin can start the year on the DL while they try and find interest for Snyder.