I believe All Pitching ratings, from all the coaches, effect pitching during a season as well as development of pitchers from season to season. Same with Hitting ratings or any other rating. The Hitting coach that has a measly 41 pitching rating is better than the hitting coach with a 9 pitching rating regarding your staff, providing his core rating, hitting, is the same. Others may not believe this, but it seems to be the case with the teams I have had.