Boston Red Sox
How is it possible? The BoSox have a few very good prospects including 3B Kevin Youkilis, SS Hanley Ramirez, C Kelly Shoppach and some quality young arms including LHPs Brian Marshall and Abe Alvarez.

How likely is it? It is possible. The talking and writing baseball gurus are implying a three-way trade with the Cubs. Boston send disgruntled SS Nomar Garciaparra to the Cubbies for some of the Cubs minor league pitchers (the Cubs have the best young arms in the minors, led by Angel Guzman). The BoSox would then send the pitching prospects (and maybe some of their own prospects) to the Diamondbacks in exchange for Randy Johnson. I don't see it happening if the Cubs are still interested in Johnson. Why help another team get the player you want?