Gavin Lux had become a poor fit on the Cincinnati Reds' roster by the time he was traded. At the same time, in trading Lux, the Reds have exacerbated a pre-existing problem. The infield depth chart leaves something to be desired, especially up the middle.
Theoretically, Cincinnati could have Sal Stewart back up Matt McLain at second, but the top prospect isn't a great defensive fit there, and certainly can't handle short.
Other options include Tyler Callihan, who has seen a lot of his prospect shine wear off, and then there's non-roster invitees Michael Chavis and Garrett Hampson.