I don't think they're going to go with one backup infielder. With Fowler back, the easiest option is like David said, to option Almora. You lose a small bit in using Szczur as a LF defensive replacement for Soler/Contreras, but with Szczur hitting LHP and Fowler not getting moved off CF, it is only that, a small bit. That buys you until next Spring to decide whether Szczur stays or goes, and keeping him as org depth is a nice option to have in an offseason where the OF is in a bit of flux. Coghlan can play the IF in a pinch and Contreras could probably handle 1B as well if you need him to. Maximum, it would be 1 game if there were an injury of some sort. You don't just release Szczur (out of options and no way does he clear waivers) because you don't want to send LaStella down. The risk/reward just isn't there. If you have to, you go with a light bullpen for a few games. You potentially have to send down both Almora AND LaStella if everyone comes back healthy and no one else goes down. Coghlan's spot is currently held by the 8th reliever(Patton), he hasn't hit in his time as a Cub(or all season long), and he brings no unique capabilities to the roster. I have to think his roster spot(Patton's) is the first to go. If he takes long enough in rehab maybe other moves happen and they don't have to DFA him though. With that spot gone when Fowler returns, Almora is the other name that makes sense to go down when Soler is healthy. Soler and Contreras are already ahead on the every day pecking order(and are better prospects to begin with), Szczur can be a lefty masher backup OF and LF defensive replacement, and Bryant's flexibility means that Baez and La Stella technically compete against him for playing time too. If Fowler gets hurt again he can come right back up.