The Oakland Athletics have acquired infielder Jed Lowrie and right-hander Fernando Rodriguez from the Houston Astros for first baseman Chris Carter and two minor leaguers.
Right-hander Brad Peacock and catcher Max Stassi also went to Houston in Monday's deal.
Lowrie batted .244 with 16 homers and 42 RBIs in 97 games with Houston, missing two months with ankle and thumb injuries. The Astros got rid of his $2.4 million salary for this season and will likely have the lowest payroll in the majors in 2013.
Rodriguez went 2-10 with a 5.37 ERA in 71 relief appearances last year with 78 strikeouts in 70 1-3 innings.
Carter batted .239 with 16 homers and 39 RBIs in 67 games with Oakland last year, platooning at first base with left-handed hitting Brandon Moss.