For a long time now I've been a student of pitching mechanics. (si.com)
Teaching your child about pitching mechanics doesn't need to be complicated, and it doesn't need to be too technical, but you and your child must be willing to commit enough time to understand the entire process, step by step. (MomsTeam.com)
I have done some consulting on pitching mechanics for a ML team (not the Cardinals) and my work on hitting and pitching is followed by scouts and other player development folks at a number of teams. (sbnation.com)