Castellanos has not been a good defensive player to date
This is unarguable, and so we have to start here. Castellanos was Detroit’s regular third baseman for four seasons (2014-17), their regular right fielder in ’18, and then played 137 more games in right (with 11 additional in left) for the Tigers and Cubs in ’19.

This past season, however, was better. Castellanos went from minus-24 OAA to minus-7; while that’s still a negative, it’s a sizable jump. He went from minus-19 DRS to minus-9; again, still not great, but improving, and playable.

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