Nick Cafardo reports (around 1pm) that Boston appears to be locked in a stalemate with a number of clubs. They have made demands the Red Sox won't meet. They want "Jon Lester, Jonathan Papelbon, Craig Hansen, Manny DelCarmen, Dustin Pedroia."
One team could hold up dozens of trades if they drop their hints correctly. Since trading - theoretically - improves all parties, it might be smart to do what you could to prevent other teams from making trades. If you like your team, and if you don't think you can much improve it by making trades, why not do what you can to gum the rest of the league's player movement? No good could come of it, so why not stall and stall and hope to prevent your competitors from improving themselves?
At some point, teams must give up on coy suitors and make the best available offers.