The Astros have agreed to terms on a one-year, $600,000 contract with outfielder Jack Cust. Cust was released by the Phillies and Mariners last season. He hit .213 with three homers and 23 RBIs in 67 games for Seattle, who released him on Aug. 4. Philadelphia signed him to a minor league contract eight days later, then cut him on Aug. 21. The deal includes a team option for the 2013 season.