MLB asking umpires for more checks of pitchers for sticky substances

Report: MLB Umpires to Check Pitchers for Foreign Substances After They Exit Game, News, Scores, Highlights, Stats, and Rumors

Umpire Substance Checks Put Pitchers in Awkward Positions - The New York Times

MLB unveils plan to enforce rules on cheating with sticky balls

MLB asks umps for more random checks on sticky substances

MLB Rumors: Umpires Will Begin Checking For Foreign Substances

Lance Lynn becomes first MLB pitcher ejected for throwing his belt at an umpire during a substance check in the Statcast era, This is the Loop

MLB asks umps for more random checks on sticky substances

Mariners' Hector Santiago first pitcher ejected for violating sticky substance protocols - The Boston Globe

MLB asks umps for more random checks on sticky substances - NBC Sports