Key Additions: Aaron Miles (2B), Milton Bradley (OF), Kevin Gregg (RP), Corey Koskie (3B, 1B), Aaron Heilman  (RP) Key Subtractions: Kerry Wood (RP), Mark Derosa (2B), Jason Marquis (SP, RP), Henry Blanco (C) A look at the lineup: The Cubs had a very successful offense last season and that should continue again this season.  Alfonso