Surprised it's not on the list because I actually think it could be the Red Sox.
The Celts at the very least, have a good core to work with.
The Pats, despite their offensive woes and likely coming up short this year, will reload in the offseason (with or without Brady.)
Admittedly, I don't follow the Bruins at all (don't like hockey), but it SEEMS like they're doing well, have made it to the Stanley Cup finals 3 times in the last 8 years and are in first place.
The Red Sox are in trouble because they have a ton of money owed to 3 pitchers with injury concerns, their best player seeking a ridiculously large contract after free agency, no bullpen, no 2nd baseman and no CF if they trade Bradley.
Plus, the Yankees just seem to be getting better (see Gerrit Cole)