How Cubs' Aroldis Chapman helped the Castro regime before Cuban

Aroldis Chapman: The Inspiring Story of One of Baseball's All-Star Pitchers (Baseball Biography Books): 9798397917728: Geoffreys, Clayton: Books

La Pelota: More than a Cuban Pastime – The Science Survey

Yankees Pitcher Aroldis Chapman Worked as Cuban Government Informant Before Defecting

A look at how Aroldis Chapman, Yoenis Cespedes and other Cuban defectors fared in MLB – New York Daily News

Cuban League – Society for American Baseball Research

Aroldis Chapman: The Inspiring Story of One of Baseball's All-Star Pitchers (Baseball Biography Books) eBook : Geoffreys, Clayton: Kindle Store

MLB, players union agree with Cuba to allow the country's baseball players to sign without defecting

Community, Defection, and equipo Cuba: Baseball under Fidel Castro, 1959–93 – Society for American Baseball Research

Fidel Castro and Baseball – Society for American Baseball Research

Why fearsome bullpen trio isn't the key to the New York Yankees' hopes - ESPN - Yankees Blog- ESPN