In all seriousness, it remains to be seen what will happen in the Boston closer "debate". The GM and some of his stat-head associates (including, most notably, Bill James) are literally of the contention that the team should not have a designated closer at all. They suggest that the entire concept of having one anointed, usually highly paid, pitcher whose specific job it is to pitch the 9th inning of games where you have a close lead, is inherently and fundamentally flawed.
Whether the manager, Grady Little, doesn't succumb to baseball orthodoxy over the last 15 years remains to be seen. If he does what the GM appears to be hoping he'll do, however, then the Red Sox saves will probably be split between Mendoza, Fox, Timlin and Embree.
I wouldn't draft any Red Sox closer until very, very late in the draft. Two reasons: first, you're basically just going to have to guess which guy will be anointed closer (ya, Embree is the favorite, but I don't think it's even 50% likely that the ONLY lefty (95% sure of that) in the 'pen is going to be the closer), and second, whoever you pick might just blow up and fail as the "closer", if Boston even has one. Too risky to throw away any kind of decent pick on this "mess" (for fantasy baseball purposes, anyway).
"You can observe a lot just by watching."