Bryce Harper, J.T. Realmuto hope MLB is serious about clamping down on foreign substances
Why do MLB umpires sometimes randomly check the throwing hand of a pitcher? : r/mlb
MLB asks umps for more random checks on sticky substances
MLB threatens pitchers with 10-game bans for altering balls in latest crackdown
Los Angeles Dodgers' Dave Roberts concerned that Trevor Bauer getting singled out by MLB - ESPN
Mets Morning News: More history for deGrom, Luis Guillorme close to return - Amazin' Avenue
MLB's pitch doctoring problem mirrors that of the 1960s - Sports Illustrated
MLB threatens pitchers with 10-game bans for altering balls in latest crackdown
MLB asks umps for more random checks on sticky substances - Seattle Sports
Major League Baseball has a sticky stuff enforcement problem