Brian Bogusevic clubbed a walk-off grand slam in the bottom of the ninth inning to lead the Astros in a 6-5 win over the Cubs on Tuesday night at Minute Maid Park. Jimmy Paredes and Humberto Quintero each knocked in a run for Houston, which snapped a seven-game slide. Aneury Rodriguez was credited with the win. Tyler Colvin crushed a two-run homer and Aramis Ramirez went 2-for-4 with a home run for the Northsiders, who had won five of their last six contests. Carlos Marmol blew his eighth save of the season and took the loss. Casey Coleman gets the nod against Bud Norris in this afternoon's series finale.