I would agree with this, but if the Cubs see an innings limitation to Horton he wouldn’t be considered a rotation piece the remainder of the season. That is the only reason I could see them doing that. As you said, very unlikely, however.
But, I am curious to what you think is more important as a sign of expected regression for a pitcher. Is it strictly age, or are innings on the arm more important? I asked that question about Boyd. I was hoping you and a few other knowledgeable posters could answer that. Should the Cubs be concerned moving past this year with Boyd because he is 34, or should they see he has throw a little over 1,000 innings in his career, which is more like a guy 29-31. Is he any more likely to regress within the next 3+ years than a younger guy with the same innings on his arm?