May 28, 2011

• The Philadelphia Phillies agreed to terms with pitcher Les Walrond and assigned him to Reading.

May 27, 2011

• The Detroit Tigers traded second baseman Scott Sizemore to Oakland for pitcher David Purcey.

May 26, 2011

• The Atlanta Braves traded pitcher Rodrigo Lopez to the Chicago Cubs for pitcher Ryan Buchter.

May 25, 2011

• The New York Yankees claimed pitcher Kanekoa Texeira off waivers from Kansas City.

May 23, 2011

• The Milwaukee Brewers claimed pitcher Daniel Ray Herrera off waivers from Cincinnati.

May 21, 2011

• The Arizona Diamondbacks released infielder Russell Branyan.

May 19, 2011

• The Boston Red Sox agreed to terms with pitcher Kevin Millwood on a minor league contract.
• The Colorado Rockies traded pitcher Franklin Morales to the Boston Red Sox for a player to be named later or cash.

May 16, 2011

• The Seattle Mariners released outfielder Milton Bradley.
• The St. Louis Cardinals claimed pitcher Jess Todd off waivers from the N.Y. Yankees.

May 14, 2011

• The Pittsburgh Pirates released pitcher Scott Olsen.

May 13, 2011

• The Seattle Mariners claimed pitcher Jeff Gray off waivers from the Chicago White Sox.

May 8, 2011

• The Kansas City Royals traded outfielder Gregor Blanco to Washington for a player to be named.

May 6, 2011

• The New York Yankees claimed pitcher Jess Todd off waivers from Cleveland.

May 4, 2011

• The Texas Rangers agreed to terms with outfielder Leonys Martin on a five-year contract.

May 1, 2011

• The New York Yankees announced pitcher Kevin Millwood has opted out of his contract.