Anyone can have a bad year, but even in his bad year he did one thing right (hit lefties) the Sox need. Could he be an upgrade over Yoshida? And one that doesn’t involve spending? It’s a one year gamble that is probably worth taking.
Even you included him. Well the Sox aren’t going to take him and DFA/release him. If they do get him, he will be a RHH bat in their lineup. It’s the same deal, but without the Sox getting a player (Robles) they don’t need and keeping a player (Abreu) they do, either on their lineup or in part of another deal.
To me, the only question is, would Seattle want Mayer. I have my doubts since all he does is make their SS position cheaper and probably doesn’t address their offense. Really, this deal probably needs a third team (Milwaukee?) that needs a SS and can send them a cheap and useful bat or two…