Former Braves pitcher John Smoltz used pine tar on the mound?

Former Braves pitching coach Leo Mazzone told Sirius XM radio that John Smoltz used to rub pine tar on the balls when he pitched. It is quite the accusation from Mazzone who was once considered the best pitching coach in the game. 

"One time Smoltzy had it on his shoes and I said, 'John, you can't keep bending over and touching your shoes all the time. Let's put it someplace else,' '' Mazzone said.

Smoltz posted 213 wins and 154 saves in his 20-year career, winning the Cy Young in 1996. Mazzone was the Braves pitching coach from 1990-2005.