I’ve always been a big fan of the writing of the fast-becoming-ubiquitous Malcolm Gladwell - here’s a recent ESPN interview with him talking about his new book Blink as it applies to sports. It repeats many of the central ideas of the book, but the “Warren Harding error” is the most interesting in a baseball context i.e. that we sometimes end up hiring people who look right, as opposed to those who really do perform. Which could be the central lesson of Moneyball.
Gladwell also talks about the idea that those who can do often really can’t teach, because they themselves aren’t too aware of their own movements - at some level of athletic performance the amount of time required to process what to do would be too long, and your instincts take over. As happens in batting, presumably.