It's been said that hitting a baseball is the toughest task in professional sports. Hitting a 100+ MPH fastball off of Reds Aroldis Chapman is nearly impossible.
Pitching expert Tom House and the Sport Science team explain Chapman's mechanics that enable him to throw 105 MPH. His 7.5 ft stride and quick release gives the hitter a very short time to react to the fastball.
Aroldis Chapman, the 6' 4" left-handed pitcher, is know as the "Cuban Missile."
The Fastest Pitcher is Baseball History - Baseball Almanac
Aroldis Chapman Statistics and History - Baseball-Reference.com