Mark Fainaru-Wada and T.J. Quinn of ESPN. YokalSports.com was the first to report the news (on Twitter). Braun is facing a 50-game suspension and is disputing the positive test through arbitration.
"There are highly unusual circumstances surrounding this case which will support Ryan's complete innocence and demonstrate there was absolutely no intentional violation of the program," said a spokesman for Braun in a statement. "While Ryan has impeccable character and no previous history, unfortunately, because of the process we have to maintain confidentiality and are not able to discuss it any further, but we are confident he will ultimately be exonerated."
Braun, 28, was tested during the playoffs and notified of the positive result in late-October. Elevated levels of testosterone in Braun's system triggered the positive test, which prompted MLB to ask the testing agency to perform a second test. The second test determined that the testosterone was exogenous, meaning it was produced outside of Braun's body.