(CBS) Contrary to rumors that have been flying for nearly a week, a league source told 670 The Score Thursday that the White Sox reached out to Major League Baseball and were assured that catcher A.J. Pierzynski will not be suspended for using a banned substance.

The source said rumors that Pierzynski tested positive for using a banned substance were not true.

Rumors reached a peak Wednesday when they were posted on message boards and they concerned the White Sox enough to inquire with the league office.

The word back from Major League Baseball was that there is nothing to the rumors, according to the league source.

“I’m not interested in talking about rumors,” White Sox pitching coach Don Cooper said Thursday on The Mully And Hanley Show on 670 The Score. “If you’re foolish enough to use them, then you deserve to get caught.”

Pierzynski, 35, is batting .281 with 71 RBI and a career-high 24 home runs this season.