May 26, 2010

• The New York Yankees agreed to terms with pitcher Chad Gaudin.

May 25, 2010

• The New York Mets claimed infielder Justin Turner off waivers from Baltimore.

May 21, 2010

• The Chicago Cubs signed pitcher Bob Howry and added him to the active roster.
• The San Diego Padres agreed to terms with infielder Duanel Jones.

May 20, 2010

• The Arizona Diamondbacks agreed to terms with pitcher Luis Ayala on a minor league contract.

May 19, 2010

• The Houston Astros waived infielder Kazuo Matsui.

May 18, 2010

• The Pittsburgh Pirates agreed to terms with pitchers Bryan Almonte, Angel Sanchez, Oderman Rocha, Jose Luis Acosta, outfielder Willy Garcia and first baseman Jose Roman.

May 17, 2010

• The Arizona Diamondbacks acquired pitcher Saul Rivera from Cleveland for cash considerations.

May 16, 2010

• The Tampa Bay Rays agreed to terms with pitcher Ricky Orta on a minor league contract.

May 14, 2010

• The New York Mets signed catcher J.R. House and outfielder Valentino Pascucci to minor league contracts.
• The New York Yankees claimed pitcher Shane Lindsay off waivers from Colorado; released pitcher Christian Garcia.

May 5, 2010

• The Florida Marlins agreed to terms with first baseman Doug Mientkiewicz on a minor league contract.

May 3, 2010

• The Seattle Mariners released pitcher Ricky Orta.

May 2, 2010

• The Seattle Mariners released outfielder Eric Byrnes.