Remembering Phil Niekro, King of the Knuckleballers (1939-2020)
The two things about Phil Niekro that I remember most — and the lessons attached
Phil Niekro, knuckleball specialist, dies at 81 - Sports Illustrated
Phil Niekro - Cooperstown Expert
Phil Niekro - Atlanta Braves Pitcher
Remembering Phil Niekro: A Marvelous Career - Overtime Heroics
Why don't more major league pitchers throw the knuckle ball? - Quora
Hall of Famer Gaylord Perry, dead at 84, was a spitball-throwing 'outlaw in strictest sense of the word'
MLB Power Rankings: The Modern Era's 25 Best Pitching Workhorses, News, Scores, Highlights, Stats, and Rumors