That's an interesting question which I can't 100% answer with certainty. It's my belief that a player can only play as much as his DUR or STM allow him to play(or pitch). To me, if a guy capable of 40 innings at 100% pitches 40 innings, you've done all you can do to develop him. I've never had any trouble developing RP using this as my guide but, quite possibly, maybe I needed to throw him 70 innings even if that meant risking him to injury at 63%.