Thanks to Rob Neyer for this-free throw shooting performance has stayed constant throughout the last 50 years. And unlike other stable indices like scoring in golf and batting average in baseball, the act of shooting a free throw is exactly the same-for you and I or Shaquille O'Neal. In fact, you're probably better at it than Shaquille.
An interesting review by my personal favorite, Roger Angell, of Joe Torre's book The Yankee Years. I think I want to read it, but it seems, from what I've read about it, to be less a baseball book than a celebrity book, and I'm not so interested in that part.