For those of you who are interested in sports stats like the baseball pythagorean theorem, VORPP, DICE, adjusted +/-, etc, Mathletics: How Gamblers, Managers and Sports Enthusiasts use Mathematics in Baseball, Basketball and Football is a good introduction to the statistics and how they are used in baseball, basketball and football. I found the descriptions of how the stats are used enlightening. There is also a web site for the book with Excel Spreadsheets that cover the examples given.