Victor Conte has died at 75 years old. He was the architect of a scheme to provide undetectable performance-enhancing drugs to professional athletes. They included baseball stars Barry Bonds and Jason Giambi and Olympic track champion Marion Jones. A sports nutrition company Conte founded said in a social media post that he died Monday. It didn't disclose his cause of death. The federal government’s investigation into another company Conte founded led to the convictions of Jones, elite sprint cyclist Tammy Thomas and former NFL defensive lineman Dana Stubblefield. Also convicted were coaches, distributors, a trainer, a chemist and a lawyer.