Game-Used Baseball: Greg Holland Pitched Ball to Joey Gallo (TEX@KC 4/1/21) | Kansas City Royals Auctions
Emery ball - Wikipedia
BASEBALL; Sandpaper II: Leary Pure But Rough Finish for Yanks - The New York Times
Spitballs, nail files, and other ways pitchers cheat | The Week
Video Archive: Joe Niekro Ball-Scuffing Incident
Posey, Blackmon on All-two-way player team
Joe Niekro gets ejected for cheating, 30 years ago today - Sports Illustrated
Joe Niekro gets ejected for cheating, 30 years ago today - Sports Illustrated
Baseball will revisit the pine-tar provision – The Durango Herald
What does sandpaper do to a ball? - ESPN Video
Darren Rovell on Twitter: "Pitchers playing the ball has been around much longer than the prevalence of performance enhancing drugs. In 1999, Tigers pitcher Brian Moehler was caught with sandpaper GLUED TO
MIN@CAL: Joe Niekro ejected from game - YouTube
Why cricketers sandpaper their balls
Pine tar, Vaseline, spit all part of baseball
Hottest pitching prospects in each farm system May 2022