Seriously though, if Soriano signed with the Sox, I'd put us as the favorite on paper.
The only team in the AL that should be better than the Sox if that happened would be Boston, but their rotation is a huge question mark. And their bullpen, since Bobby is setting up and not closing.
And while the Phils have far and away the best rotation, their lineup is like Boston's pitching staff.
Meanwhile the Sox could have a lethal lineup, a top 5 rotation depending on Peavy's health and a BP of:
CL - Soriano
SU - Crain
SU - Thornton
MR - Sale
MR - Santos
MR - Infante
LR - Pena
That right there is a good bullpen.
Also of note, the other places he'd sign are either almost at their limit too (Angels, especially if they get Beltre) or he wouldn't close (Yankees)