Vijay Singh was unaware that a deer-antler spray he admitted using contained a substance banned by the PGA Tour.
Singh, who has won 34 PGA tournament titles in his career, told Sports Illustrated that he paid $9,000 to SWATS, the company that said it sold the spray to Baltimore Ravens linebacker Ray Lewis and college football players from Alabama and LSU, for its products.
The deer-antler spray contains a performance-enhancer similar to human growth hormone.
"While I have used deer antler spray, at no time was I aware that it may contain a substance that is banned under the PGA Tour Anti-Doping Policy," Singh, 49, said in a statement at the Phoenix Open in Scottsdale, Ariz.
"In fact, when I first received the product, I reviewed the list of ingredients and did not see any prohibited substances. I am absolutely shocked that deer-antler spray may contain a banned substance and am angry that I have put myself in this position. I have been in contact with the PGA Tour and am cooperating fully with their review of this matter. I will not be commenting further at this time."
According to reports, the PGA Tour is investigating.