Houston Astros general manager Jeff Luhnow knew that he would be building for the future and that he had a number of pieces to trade. He was successful in acquiring a number of prospects and young major leaguers in return for his veterans.
In their first trade of July, the Astros dealt Carlos Lee to the Miami Marlins for pitcher Rob Rasmussen and third baseman Matt Dominguez. John Sickels of MinorLeagueBall.com has said that Dominguez could be a Pedro Feliz-type player.
Luhnow and Houston then dealt David Carpenter, J.A. Happ and Brandon Lyon to the Toronto Blue Jays for Asher Wojciechowski, Carlos Perez, David Rollins, Joseph Musgrove, Francisco Cordero and Ben Francisco. Wojciehowski, Perez and Musgrove were all top-20 prospects in the Blue Jays system entering the year, per Sickels.
In return for Brett Myers, the Astros received Blair Walters and Matthew Heidenreich from the Chicago White Sox.
Houston followed up that deal by acquiring Colton Cain, Robbie Grossman and Rudy Owens from the Pittsburgh Pirates for Wandy Rodriguez. Grossman is the top prospect out of that group, but Owens has the ability to be a solid back-of-the-rotation starter.
The last deal that the Astros made was trading Chris Johnson to the Arizona Diamondbacks for Bobby Borchering and Marc Krauss, according to Nick Piecoro of the Arizona Republic. Both of these players have shown a lot of power potential and could be impact bats for the 'Stros in a few years.
The Astros may not have brought in any future superstars, but they certainly brought in a number of guys who could contribute in the future.