Mazz's grade: A
Over the winter, he might have traded for Johan Santana, but instead opted to generally keep his team intact. Sure, Clay Buchholz went poof, but Jon Lester blossomed and Justin Masterson bloomed. Along the way, Epstein swapped Manny Ramirez for Jason Bay and left the Sox none the worse for wear (yet) while adding both Mark Kotsay and Paul Byrd for nothing more than a few dollars. Sounds like the GM had a good year. Now can the Sox please finalize that contract extension?
(Globe Staff Photo / Barry Chin)