DALLAS -- The Chicago Cubs and Colorado Rockies have continued to talk trade over the last week about third baseman Ian Stewart, according to sources familiar with the situation.

During their week of discussions the teams have gone back and forth exchanging possible names in return for the 26-year-old Stewart. Originally, Cubs utilityman Blake DeWitt had been discussed. More recently outfielder Tyler Colvin and infielder DJ LeMahieu have been brought into the discussions.

The Cubs have also been looking at San Diego Padres third baseman Chase Headley as the Cubs look to get better defensively at third base with a younger more athletic player at the position. The Cubs are looking to replace free agent third baseman Aramis Ramirez.

Stewart, who had a wrist injury at the end of 2011, had a completely lost season, batting .156 with no home runs and six RBIs in 48 games. He hit 43 home runs between 2009 and 2010. The situation remains fluid and medicals on Stewart's wrist are possibly being checked.

Colvin has been of interest to the Rockies as Colorado scouts feel he is closer to the player who hit 20 home runs in 350 at-bats during the 2010 season as opposed to the one who hit .150 with six homers last season.