http://www.fangraphs.com/blogs/sunday-notes-whitleys-cattle-cubs-butler-gausmans-analogy-yard-goats-more/ New market inefficiency: don't change pitchers Arrieta was told not to pitch the way that got him to the pros. Butler, who was the Oriole who was the best minor leaguer to touch a baseball again? Not just pitchers - Castro had some deprogramming that he eventually had to ignore. In all seriousness this seems like a pretty easy thing to do, but just like people make comments about tanking being easy, it's not. I'm sure what Colorado was doing with Butler was something that happens to every prospect to some degree. Why was it too much for him? Why did the Cubs approach make more sense? Sure, he was doing something that felt more natural, but it seems to mean that the caliber of coaching and the effort to monitor and understand the player is what is making the difference. I think Bosio is really good at looking at mechanics and sorting out problems. If I remember correctly, he talks with all the pitchers a lot to see what they like to do and tries to work with that instead of molding them to one philosophy. The Cubs have been fortunate to have such good pitching coaches the last decade.