Per lots of outlets on Twitter and elsewhere, sorry I don’t have the person who had it first.
To me, this makes no sense. There should be at least 5 guys ahead of Cleto on the path to the majors regardless of what kind of stuff he throws. Cleto was not above A ball before this season. Mitchell Boggs was JUST in the majors last week. Broderick and Jess Todd have been in the majors this year as well. Raul Valdes can probably give you a few replacement level innings in a pinch.
Sometimes, I have no idea what the Cardinals are doing and what their plan is. This is one of those times.