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Knuckle Ball, FIFA Football Gaming wiki
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R.A. Dickey Pitches Memoirs and the Knuckleball
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Tim Wakefield Dnuckleball Video: Tim Wakefield Knuckleball Video Compilation - VCI
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Knuckleball! 100 Films in 100 Days
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R. A. Dickey - Wikipedia
![Knuckleball - Wikipedia](https://upload.wikimedia.org/wikipedia/commons/thumb/9/95/The_Inside_Pitch_-_Hoyt_Wilhelm_and_his_Knuckleball.webm/480px--The_Inside_Pitch_-_Hoyt_Wilhelm_and_his_Knuckleball.webm.jpg)
File:The Inside Pitch - Hoyt Wilhelm and his Knuckleball.webm - Wikimedia Commons
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Wait until it stops rolling”: The uncertain origin of the knuckleball - Pinstripe Alley
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Knuckle curve - Wikipedia
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Knuckleball – Wikipedia