No idea about his 2022, but his 2023 was going well with Chicago - 3.79 ERA, 117 ERA+, 2.9 bWAR, and 131 K in 121 IP. He fell apart through two team changes. There were stories about divorce, and of course he wound up getting injured pretty quickly in ST last year. It is possible some damage was already done.
I’m not worried too much if he’s actually healthy. Of course the same applies to Buehler…