Chaffin, in competition at the 2014 Ironman Boulder. Photo: Jay Prasuhn

World Triathlon Corporation (WTC) today announced that American professional triathlete Morgan Chaffin has been suspended for two years following a positive sample of a prohibited substance.

Chaffin’s positive for testosterone occurred Aug. 3, following her race and fourth-place finish at Ironman Boulder in Boulder, Colorado. Her ban went into effect Aug. 3, 2014, the date her positive sample was collected in competition.

The WTC’s press release said that Chaffin acknowledged use of testosterone following consultation with her local physician to treat a medical condition.

“I never intended to break the rules,” Chaffin said in the release. “My mistake was in not telling my physician that I was subject to drug testing rules, and in not checking with Ironman before I received the treatment.”

Kate Mittelstadt, Director of Anti-Doping for Ironman, said in the release that its anti-doping program “is constantly working with and directing our professional athletes in particular that they must take responsibility for what they put in their bodies, and seek advice from anti-doping authorities before proceeding with any medical treatment that involves a prohibited substance or prohibited method.”

Mittlestadt went on to say that “the Ironman anti-doping rules, which are made available to all race participants, clearly identify those substances that are prohibited—including testosterone—and require a Theraputic Use Exemption before they may be used.”

Hailing from Omaha, Nebraska, Chaffin’s website says she was the first overall age grouper at Ironman 70.3 Racine in 2010 before claiming her pro status. Her results include a runner-up finish at the Great Clermont Triathlon in 2013 and wins at the Pigman Long Course Triathlon and Omaha Women’s Triathon in 2014. She was also a Nebraska state time trial champion in 2008 and ’09, and the 2005 and ’06 Nebraska state criterium, time trial and road race champion.