I would try to get him extra rest from here on out. Schedule some bullpen days started by Kopech. Bummer looks back and with Kimbrel, you ought to be able to stretch Kopech out.
This is not the first game O'Nora has sucked in:
He's also a creep: https://deadspin.com/mlb-ump-brian-onora-opted-out-of-the-season-wound-up-a-1845835009
Just read Fegan’s interview with Hahn. I have never encountered anyone who was so good at conveying exactly no information. Gotta admire Hahn for it. It’s a real skill.