Fastball - Wikipedia
Aroldis Chapman, Baseball Wiki
Cincinnati Reds Top 20 prospects for 2016 - Minor League Ball
Aroldis Chapman's back! Timeline for Yankees closer
Essentials of Baseball Development – A look into my life, career, and the world of baseball development
Aroldis Chapman Stretches the Reds' Budget, and the Limits of Pitching - The New York Times
Emmanuel Clase throws MLB's hardest cutter
Cincinnati Reds - Congratulations, Cuban Missile! Aroldis Chapman has 500 career strikeouts in 292.0 innings, the fastest to 500 strikeouts in Major League history.
Aroldis Chapman Pitching in Slow Motion Video analysis and sports coaching mobile app for iPhone and iPad, with slow motion and side-by-side comparison - Ubersense and Ubersense Golf
Chris O'Leary's Pitching Primer
The Reds took a step forward in 2023. What's next? - Redleg Nation
Baseball 2013: Here Come the Flamethrowers - WSJ
Aroldis Chapman Pitching Mechanics (First Base Side VIew)
Pitcher Arsenals: Velocity, Movement, Spin, Tunneling