Mariners' George Kirby unveils knuckleball in final game of the season

Logan Gilbert unleashes 'Walter' as Mariners finish 4-game sweep of A's, Mariners

George Kirby dominant again as Mariners knock off Braves 3-1

Mariners' George Kirby Pays Tribute to Tim Wakefield with First Knuckleball of Season - The Messenger

George Kirby makes Spring Training debut

Oakland Athletics' All-Star Has Hilarious Reaction on Social Media to George Kirby's Knuckleball - Fastball

Watch: Mariners' George Kirby throws rare knuckleball in tribute - Seattle Sports

George Kirby throws knuckleball for first time in game