Has anyone had any luck getting a young pitcher to eliminate a bad pitch?
I have a couple young pitchers who have ratings around 18-20 for their 4th and 5th pitches. They are better off eliminating these pitches from their repertoire.
Has anyone found a proven method of doing so?

I may be wrong but I believe I've only seen it happen to my guys who had single digit pitches. I've hoped it would happen to a few guys who had ~20 ratings but they unfortunately keep the pitch.

Example: Ed Green dropped a 7 rating on his P5 in his 2nd pro season. Whereas Josias Cordero had an 18 on his P5 in his second pro season but kept his.

Edit: Just realized you can't see past ratings. Gonna have to take my word.