Sorry, my time machine's flux capacitor is broken right now, so I can't say for sure. Most likely he's not here beyond next year, but nothing is set in stone. Maybe Teixeira, Ortiz, Ibanez, or someone else gets hurt midseason and offers the Sox something good for Dunn. Maybe Dunn has a good year and the Sox decide to keep him around. Maybe none of those things happen. But we don't know for sure, which is why there isn't one team in baseball that would pay $14M just to make such a person go away.