Stallings, a three-time tournament winner, owned up to officials after learning the supplement he had been taking — known as DHEA — was considered performance-enhancing.

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The 30-year-old said he was advised to take the supplement by his doctor, and claimed he was taking the substance — which was to deal with an “incredible amount of fatigue” — during the Humana Challenge in January, when he did not produce a positive test.

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Stallings released the following statement:

He will be eligible to return on Oct. 7.

I immediately self-reported this fact to the PGA TOUR – consistent with my values and with the long tradition of self-reporting all rules violations on or off the golf course.

I regret my inadvertent mistake in not doing my homework to know for sure what was on the list of permitted and non-permitted substances. I take responsibility and accept the penalty imposed by the PGA TOUR.