Coaches can be wrong, just because Edsall named Z the starter doesn’t mean he made “the right choice” it could be the wrong choice. We won’t know until both get some game time action. SK got some snaps but it wasn’t against the first team defense, it would be interesting to see what he can do against the ones. But coaches can make the wrong choice, it happens all the time in sports. There’s players that don’t practice well and kills it in games, then you have players that kills it in practice and make zero impacts in live games.