Sportswear manufacturer Adidas has suspended its sponsorship of U.S. sprinter Tyson Gay after athlete failed drugs test. Mr Gay, 30, is joint second-fastest man ever over 100 metres and fastest man in world this year. He tested positive for banned substance in out-of-competition test on May 16. Adidas spokesman said: "We are shocked by these recent allegations. Even if we presume his innocence until proven otherwise, our contract with Tyson is currently suspended." sportswear giant had been sponsoring Gay since 2005. It has right to terminate contract, “if athlete is found guilty of possession or use of drugs or any other prohibited substance”. Gay is currently waiting to hear results of his B-test, following illegal stimulant being found in his initial A-test. He told reporters on Monday that he did not knowingly take part in any doping programme. He said: "I don't have sabotage story. I basically put my trust in someone and was let down. I know exactly what went on, but I can't discuss it right now." He said he was still optimistic about future, saying: "I hope I am able to run again, but I will take whatever punishment I get like man." News of Gay's positive test emerged shortly after another sprinter, Jamaica's former 100m world record holder Asafa Powell, was also revealed to have failed drugs test.