Braves Hall of Famer Phil Niekro dies at 81 after battling cancer
With Phil Niekro's Death, Baseball Has Lost the Knuckleball and Its Master - The New York Times
Phil Niekro, Baseball Hall of Famer and knuckleballer, dies at 81 – The Denver Post
List of knuckleball pitchers - Wikipedia
Phil Niekro, knuckleball specialist, dies at 81 - Sports Illustrated
Phil Niekro, Hall of Fame Knuckleball Pitcher, Dies at 81 - The New York Times
Baseball Hall of Famer, knuckleballer Phil Niekro dies at 81
Knuckleball, Doctored Ball? - The New York Times
Baseball great Phil Niekro dies of cancer at 81
Remembering Phil Niekro, King of the Knuckleballers (1939-2020)