7/29-2012- Acquired Bobby Borchering, OF/1B/3B and Marc Krauss, OF from Arizona for Chris Johnson, 3B.
7/24/2012- Acquired Rudy Owens, LHP, Colton Cain, LHP, and Robbie Grossman, OF from Pittsburgh for Wandy Rodriguez, LHP.
7/21/2012- Acquired Blair Walters, LHP, Matt Heidenreich, RHP, and (PTBNL) Chris Devenksi, RHP from Chicago White Sox for Brett Myers, RHP.
7/20/2012- Acquired Francisco Cordero, RHP, Ben Francisco, OF, Joe Musgrove, RHP, Asher Wojciechowski, RHP, David Rollins, LHP, Carlos Perez, C, and (PTBNL) Kevin Comer, RHP from Toronto for J.A. Happ, LHP, Brandon Lyon, RHP, and David Carpenter, RHP.
7/4/2012- Acquired Matt Dominguez, 3B and Rob Rasmussen, LHP from Miami for Carlos Lee, 1B. It is not yet reported how much of Lee's remaining 2012 salary the Astros will pay.