Major League Baseball cheating illegal rules
A gripping saga: 11 tales of pitchers using spitters, sandpaper and scuffing - Sports Illustrated
Trevor Bauer: legalize pine tar and other sticky substances for pitchers - NBC Sports
Does pine tar benefit pitchers? - Over the Monster
MLB PINETAR Cheaters
Why not call Garrett Richards on his pine tar? - Lookout Landing
MLB pitchers doctoring baseballs are changing the game - Sports Illustrated
Feature - Mom, can I have some pine tar? All the other pitchers are using it.
A Yankees Pitcher's Hand Revives Arguments Over Pine Tar - The New York Times
Why Do Baseball Players Use Pine Tar? Here's the Reason
MLB pitchers using pine tar is against the rules, but everyone's OK with it
Should Hitters Be Allowed To Use Pine Tar When Pitchers Can't? My Thoughts
5 TRICKS To Using PINE TAR That The PROS Don't Want You To Know!