If the Cubs trade for Castellanos, the club would probably move Jason Heyward to center and ask its new addition to play right field, McCosky notes.
Chicago has struggled against left-handers this season, and adding Castellanos could help buck that trend. The 27-year-old has recorded a 1.090 OPS against lefties during his 2019 campaign with the lowly Tigers.
In mid-June, Castellanos - an impending free agent - rejected Detroit's request to move to first base because the team didn't offer him a contract extension.
The 2010 first-round pick has spent his seven-year career with the Tigers. In 829 games he's slashed .275/.325/.460 with 103 home runs and 204 doubles.