Who says that Yaz didn't click with this regime? He had stagnated in the upper levels for a few years before the new regime took over. Almost anyone would have concluded that he wasn't going to amount much at the ML level. Perhaps whatever the core surgery corrected had been nagging him for years. I don't know. I know that statistically, Yaz seemed like a 4th OF was his ceiling. And he was 27-28. Stuff happens. That one is tough to explain.