Phil Niekro, Hall of Fame Knuckleball Pitcher, Dies at 81 - The New York Times

Baseball Hall-of-Famer, knuckleballer Phil Niekro dies at 81, Sports

Phil Niekro, Atlanta Braves legend known for knuckleball pitch, dies at age 81

Former knuckleballer RA Dickey sends tribute to Phil Niekro

Obituary: Phil Niekro (1939-2020) – RIP Baseball

List of knuckleball pitchers - Wikipedia

Phil Niekro, RIP: Great pitcher, better friend

With Phil Niekro's Death, Baseball Has Lost the Knuckleball and Its Master - The New York Times

Braves Hall of Famer Phil Niekro dies at 81 after battling cancer