Why Pitchers Use Pine Tar

Not everybody is doing it and it does create an unlevel playing field.

Trevor Bauer suggests Astros use foreign substances on balls in

With Smudge and Streak, Rogers Has Left Imprint - The New York Times

Inside the Not-so-Secret Art of Pitchers Using Foreign Substances

Indians' Trevor Bauer talks pine tar, spin rate, experiments and

This Is Being Called One Of The Best Catches In Cricket History

Why Pitchers Use Pine Tar

Chris Archer responds to Reds broadcaster's pine tar allegations

Why do baseball players use pine tar?

Absolutely I'm All for It': MLB's Stars Debate Pitchers Using

Why It Is Still a Big Deal That Pitchers Use Pine Tar

The Place Beyond the Pine Tar - Zone Coverage

Trevor Bauer explains what 70 percent of MLB pitchers are doing