By Rachel Nichols

Monday, October 13, 2008

You can't clock a brain in the 40. Film can break down a golfer's swing to its tiniest arc, a yardstick can determine a basketball player's vertical leap. But neither guarantees a Tiger Woods or a Michael Jordan. Because, really, it's the brain that makes the athlete, and, maddeningly, there is no stopwatch that measures smarts. So instead, we guess. We poke, we prod. We pretend we know what's inside an athlete's head and how it affects the way he or she performs. Rex Grossman is familiar wi ...

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