He also got the basic math of the situation wrong. It's not a comparison between Mauer's batting average and Willingham's batting average, because by walking Mauer made it possible for Willingham to drive in a run with a hit OR a walk (or a passed ball, wild pitch, error, etc.). So it should be Mauer's AVG vs. Willingham's OBP, in which case Willingham's OBP (plus errors, WP, PB, etc.) is much, much higher anyway.