Scottsdale, AZ (Sports Network) - Vijay Singh admitted on Tuesday that he useddeer antler spray, a banned substance under the PGA Tour's Anti-Doping Policy.

After his name was included in a "Sports Illustrated" story about S.W.A.T.S.,- Sports with Alternative to Steroids - "a two-man company run out of a gymnear Birmingham," Singh released a statement:

"In light of the recent article on, I want to issue thefollowing statement:

"While I have used deer antler spray, at no time was I aware that it maycontain a substance that is banned under the PGA Tour Anti-Doping Policy. Infact, when I first received the product, I reviewed the list of ingredientsand did not see any prohibited substances. I am absolutely shocked that deerantler spray may contain a banned substance and am angry that I have putmyself in this position. I have been in contact with the PGA Tour and amcooperating fully with their review of this matter. I will not be commentingfurther at this time."

"Sports Illustrated" reported that Singh paid S.W.A.T.S. $9,000 for the sprayand various other products.

The tour notified players that the deer antler spray had been implicated in apositive drug test. According to the article, golfers were made aware of thespray's nature in 2011.

Singh, who turns 50 in a month, has long been one of the most physically fitplayers in golf. He has at times been a lightning rod for controversy, butthis may reach another level.

The only player suspended by the PGA Tour for a banned substance was DougBarron. He received a one-year suspension due to a failed drug test forelevated levels of testosterone.

Singh has not failed a drug test, so what the tour can do as to suspendingSingh remains to be seen.

Singh is still in the field this week for the Phoenix Open.