Everyone in the AL West made a trade this month, with the exception of the Halos..
- No trades completed.
- Acquired first baseman Brandon Allen and reliever Jordan Norberto from the Diamondbacks for right-hander Brad Ziegler.
- Acquired outfielders Trayvon Robinson from the Dodgers and Chih-Hsien Chiang from the Red Sox in a three-team deal. Boston received starter Erik Bedard and reliever Josh Fields from Seattle. Meanwhile, Boston sent catcher Tim Federowicz, reliever Juan Rodriguez, and starter Stephen Fife to Los Angeles.
- Acquired third baseman Francisco Martinez, outfielder Casper Wells, southpaw Charlie Furbush, and a player to be named later from the Tigers for starter Doug Fister and reliever David Pauley. The PTBNL is reportedly one of the Tigers' top three picks from the 2010 draft, meaning that it's either Nick Castellanos, Chance Ruffin, or Drew Smyly.
- Received cash considerations from the Diamondbacks for Ryan Langerhans.
- Acquired reliever Mike Adams from the Padres for pitching prospects Joe Wieland and Robbie Erlin.
- Acquired Koji Uehara and $2MM from the Orioles for Chris Davis and Tommy Hunter.
- Acquired Nick Green and cash considerations from the Orioles for lefty reliever Zach Phillips.