So this is a more general question, but it seems like a decent place to ask it. Can plate discipline really be taught to players at the minor league level and up? My brother believes players are too ingrained in their approach by the time they reach professional baseball (minors on up) to undergo radical change. I don't follow minor league baseball enough to know if low OBP guys commonly learn to take walks, or if that's a rarity. If it's a high school player I think that his discipline and judgement can be changed if the team jumps on the issue rather quickly. I believe that we had a good chance at changing Harvey, but the Cubs were slow and lazy to approach the problem and it only became more engrained in him. At this point I highly doubt anything will change barring a major, major change in organizational philosophy and coaching.