He actually wasn't that bad on Boston which is why Hahn traded Reese McGuire for him. You also mention Boston like he was there for awhile, when in fact, he only played there one year. You failed to name the other teams he played for where he had success like Oakland, Texas and Philadelphia. Maybe I should implore you to be more aware of other teams in baseball other than the Sox. I appreciate and respect you are a die-hard Sox fan which is fine, but you seem to be loyally blinded to a point of being a "homer", when others question your guys and certain inabilities compared to other teams. I like many other fans here, are just as damn loyal and die-hard as you, but that doesn't mean I or anyone else here, can't criticize the players, manager, coaches, owner and front office. That is what fans do instead of always justifying there is nothing wrong.
Plus you are still taking the Diekman argument out of context and missing my point. I never mentioned anything about Boston. I simply told you how the Rays, who are a superior player development team versus the Sox, improved Diekman that Katz couldn't do. You still haven't explained that. Plus I am not going to play this game of you mentioning one or two pitchers that are better since coming to the Sox, because I can list tons of pitchers doing well on other teams after leaving the Sox.
Yes you're right, Dylan Cease was a Cy Young runner up. Yet if Katz is the guru, why couldn't he get Dylan back to, or close to 2022 form...especially with his control issues.
The bottom line is you think Katz is a stud pitching coach and I don't. We agree to disagree. But don't give me your condescending crap implying you know so much more than me or others here. I follow and read about baseball as much as you do, and I also actually played in high school and college. Some times we can agree to disagree, as my comments here are just as solid with facts and logic as yours.