The Cubs traded Tyler Colvin and infielder DJ LeMahieu to the Rockies for Ian Stewart and Casey Weathers. Stewart, 26, who had a wrist injury at the end of 2011, batted .156 with no home runs and six RBIs in 48 games. He hit 43 home runs between 2009 and 2010. "We wouldn't have given up the talent that we did if we didn't think he (would be the starting) third baseman," said Cubs general manager Jed Hoyer. "We are expecting him to come in and he has to bounce back from last year. We are assuming he does. We are looking at him as our starting third baseman."