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Mariners' George Kirby Pays Tribute to Tim Wakefield with First Knuckleball of Season - The Messenger
George Kirby makes Spring Training debut
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Mariners' George Kirby unveils knuckleball in final game of the season
Mariners top pitching prospect George Kirby has more than just a fastball in his arsenal, National
Knuckleball - Wikipedia
Mariners' George Kirby Pays Tribute to Tim Wakefield with First Knuckleball of Season - The Messenger
Mariners' George Kirby Pays Tribute to Tim Wakefield with First Knuckleball of Season - The Messenger
George Kirby throws knuckleball for first time in game
Adam Jude The Seattle Times
Logan Gilbert unleashes 'Walter' as Mariners finish 4-game sweep of A's, Mariners