Concerned About Aroldis Chapman's Slowing Fastball? He Isn't - The New York Times
Unhittable? Aroldis Chapman and His 105-M.P.H. Fastball - The New York Times
Baseball's Hardest Thrower Now Comes With Whiffs - The Ringer
The art of the fastball - Bless You Boys
Aroldis Chapman's 105mph fastball shows speed isn't everything in sports, MLB
Chapman throws 105-mph pitch
Step Into the Batter's Box and Face a 100 MPH Fastball With The 'Nolan Ryan Cam' - FanBuzz
PHOTOS: Aroldis Chapman, Ben Joyce's 105-plus mph pitches
Aroldis Chapman ties record for fastest pitch ever recorded