Nolan Ryan - Wikipedia
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Andy Pettitte – Society for American Baseball Research
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Andy Pettitte PSA AutographFacts℠
How many career wins does an MLB pitcher need to be considered great? - Quora
Andy Pettitte Stats, Fantasy & News
Baseball 101: Comebacks - Newsday
Lou Gehrig Jeff Permuy's Sports & Stats Blog
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2009 Yankees Topps World Series Champions #NYY26 Andy Pettitte HL/Polishes off Philadelphia for Crown - NM-MT
Former MLB pitcher Andy Pettitte says sports is a way to unify politically divided country