The Mariners are expected to acquire first baseman Casey Kotchman from the Red Sox, sources have told ESPN The Magazine's Buster Olney. Seattle would send at least one minor leaguer to Boston for Kotchman, who would become the team's starting first baseman. Kotchman, who split 2009 with the Red Sox and Braves, hit .268 with seven home runs and 48 RBIs.