Sandoval camp insists that no deal is final yet. It also makes zero sense to drop major bucks for Hanley to play LF when you already have Betts, Castillo, Victorino, Nava, Craig, Bradley, and Cespedes all under contract for next season. I understand that this groups contains a pretty toxic combination of injury-prone guys and guys who expire next year, but Hanley is not a model of reliability either.
You pretty much have to trade Cespedes and Bradley Jr / Bogaerts for this to work, and I doubt any of them will fetch a #1 starter. Using the Sandoval slot to sign Lester just makes a lot more sense; I really have no idea what the Sox are trying to do here.