Aroldis Chapman can't stop buckling batters' knees with his insane fastball

Chapman hits 106 MPH in relief appearance

The most hyped prospect ever for all 30 MLB teams - ESPN

Deeper look at Aroldis Chapman's declining velocity reveals more than fastball concerns

PHOTOS: Aroldis Chapman, Ben Joyce's 105-plus mph pitches

Aroldis Chapman vs Matt Chapman ends with a 103.4 MPH strikeout!

Aroldis Chapman's new toy is actually unhittable, Bronx Pinstripes

10 of our favorite pitches: 'The Defector' for sure makes the cut

the joy of sox: 2021-07

Aroldis Chapman Placed on 10-Day DL with Knee Injury; Chance Adams Recalled, News, Scores, Highlights, Stats, and Rumors

Photo Proves Getting Drilled in Ribs by Aroldis Chapman Fastball is the Most Painful Experience in Sports

The most hyped prospect ever for all 30 MLB teams - ESPN

Aroldis Chapman surrenders walk-off as White Sox beat Yankees

Bleeding Yankee Blue: 05/01/2022 - 06/01/2022

Glossary of baseball terms - Wikipedia