What if he dominates like Wallner and Julien did, then were sent down? You'll have to worry then.
PLenty of teams are trusting rookies, this team kept Joey Gallo all year, and bad SS in the past.
This FO seems to be in love with veterans, no matter how good the prospects are looking in the AAA or the majors. For those saying we can't trust AAA, I'm not sure what you want players to do....since playing in AAA is their option.