Knuckleball 101
Tim Wakefield - Wikipedia
Tug McGraw - Wikipedia
Ball Four (RosettaBooks Sports Classics) eBook : Bouton, Jim: Kindle Store
January, 2021
Pitcher R.A. Dickey's Tale Is As Wild As A Knuckleball : NPR
Hall of Fame knuckleballer to throw out ceremonial first pitch at Victory Field
Do long time baseball pitchers suffer bone/muscle problems in later life? - Quora
R.A. Dickey's Knuckleball Was Tricky
Do long time baseball pitchers suffer bone/muscle problems in later life? - Quora
The Baseball Codes The Baseball Codes
Hall of Fame pitcher Phil Niekro, famous for signature knuckleball, dies at 81 - ESPN