Twins' Tyler Duffey not a fan of umpires' checks for foreign substances
Coming to grips: Sticky stuff ban provokes managers, players
Sticky stuff 101 - Everything you need to know as MLB's foreign-substance crackdown begins - ESPN
MLB cracking down on pitchers using foreign substances
MLB's Foreign Substance Problem and How to Fix It – The Blue & Gold
Sticky Situation – MLB's Crackdown on Foreign Substances
MLB Foreign Substances
MLB foreign substance crackdown may end up causing hysteria
Phil Cuzzi, MLB umpire who ejected Max Scherzer, has been in glove drama before