Pedro Martínez – Society for American Baseball Research
Beltrán Sends Mets Home Tired, but Happy - The New York Times
Pedro Martínez - Wikipedia
The Dodgers once played 53 innings of baseball in 3 days
The Cooperstown Candidacy for Mark Buehrle - Cooperstown Cred
Pedro takes perfect game to extras! (Expos vs. Padres, 6/3/95)
Has a pitcher ever missed a perfect game opportunity in extra innings? - Quora
Martínez enters record books with perfect nine
Hall of Famer Pedro Martinez reminisces 2009 Phillies run