Joe Niekro, 61, a Master of the Knuckleball, Is Dead - The New York Times
Baseball great Phil Niekro dies of cancer at 81
Why are there no knuckleballers in professional baseball anymore? Is it a physiological issue, the difficulty catching a knuckleballer, or something else? - Quora
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Phil Niekro, Hall of Fame Knuckleball Pitcher, Dies at 81 - The New York Times
Phil Niekro: Baseball Hall of Famer dies at 81
Baseball Hall of Famer, knuckleballer Phil Niekro dies at 81
