Sun lotion and curveballs: Why MLB is gripped by dubious 'foreign substances', MLB
Gerrit Cole, Trevor Bauer and baseball's sticky situation
Brandon Kintzler loves MLB's sticky-substance ban and says some guys can't throw without it
This Is Spider Tack: The Men Who Inadvertently Created MLB's Stickiest Problem - WSJ
MLB foreign substance crack down: Six things to know about baseball's sticky situation
Cubs pitchers navigating new reality after MLB's foreign substance mandate - Chicago Sun-Times
MLB's remedy for baseball's sticky situation? The Ball Mudder machine
How has MLB's sticky situation affected Orioles pitching? - Camden Chat
Waiting for MLB's sticky situation to unfold and 4 other things about the Indians
MLB experimenting with pearl white baseballs to rid sticky stuff problem – Oneida Dispatch
The science behind Major League Baseball's latest sticky situation - ABC News
MLB threatens pitchers with 10-game bans for altering balls in latest crackdown