The Catcher Was A Spy
is the definitive biography of Moe, who was brilliant yet led a very strange life on and off the diamond and during the war. I don't doubt that his accomplishments undercover during the war were significant, but he was far from the typical spy, or the typical third string catcher with a 15 year major league career if there is such a thing.
If you want to learn more about this strange, eccentric fellow, read the book
http://www.amazon.com/dp/0679762892/...l_1yasp205hn_p