I realize this team has a lot of issues and hesitate to pile this on here. But I've found Fredi's use of infielders curious this year. It seems to me as a general proposition that second is a more difficult and important defensive position than third. Given a choice you want your better defender at second. This is a general proposition. I'm sure there are cases where you want to make exceptions, possibly having to do with where the players in question have the most experience.
But we've seen several games where Castro plays third while KJ plays second. And last night Beckham at third while D'Arnaud (who had an error) played second. Am I missing something there or imagining an issue that doesn't exist. This team generally is poor defensively. But little tweaks such as putting the better defender at second and weaker one at third would help some. If my memory serves me correctly, earlier we had Jace in left and KJ at second in several games. Again it seems to me you want the stronger defender at second and the weaker one in left, assuming both players are reasonably comfortable at both positions.