Ex-MLB pitcher: Pineda broke unwritten code with pine tar use - CBS News
Every team breaks pine-tar rule, so MLB should just strike it out here! – New York Daily News
Baseball's most famous 'foreign substance' abuser Gaylord Perry says pine tar is definitely a 'performance enhancing substance' … Tony La Russa agrees – New York Daily News
Why Do Baseball Players Use Pine Tar? Here's the Reason
Why Pitchers Use Pine Tar
Phish.Net: Yankee Pitcher using pine tar or?
Why Pitchers Use Pine Tar
Just Get Rid of Pine Tar Altogether! - Eutaw Street Report
MLB pitchers using pine tar is against the rules, but everyone's OK with it
5 TRICKS To Using PINE TAR That The PROS Don't Want You To Know!
MLB warns teams that pitchers caught doctoring balls will get 10-game bans beginning June 21
New York Yankees on crackdown of MLB pitchers use of sticky substances
Kikuchi is touching the brim of his hat after every pitch and no one is noticing : r/NYYankees
Sticking point: Pine tar rule to be reviewed