There was a LOT of talk at the time that Buck ruined him with his time to the plate obsession. Then he had a bad oblique pull in ST one year and never really seemed to recover. I feel like they were the same ST but could be getting my timelines mixed up.
To me he's just an example of how razor thin the line can be between a very good MLB pitcher and a borderline roster guy.
Especially when faced with a severe disease such as Opioid addiction. It's almost impossible to overcome that. It is possible, but it's just brutal. This coming from someone who has been dealing with this in my family for over 15 years now.