Shocking that A-Rod had to make this decision on the last night of the World Series. I mean, who'd have thought he and Boras would try to piggyback on a national spotlight?
I'll be surprised if the Red Sox make much of a push for him. The Yankees say they're out. The two L.A. teams could get in the mix, but I don't think the Dodgers have the funds and the Angels supposedly love Brandon Wood (though from a baseball standpoint A-Rod makes absolute sense for that club).
The Cubs are probably the nominal favorite, but A-Rod would push them into heady payroll territory. If the Phillies are willing to play the "Hey, we're a big market too" game, they could get in the mix.
Personally I'd like to see him in San Francisco because it would make that club interesting and I think MLB needs an interesting club in San Francisco.