Two-time Olympic swimmer Connor Dwyer has announced he will retire from swimming after being suspended for 20 months for doping, preventing him from competing at next year's Tokyo Olympics.
Reuters quoted the US Anti-Doping Agency as saying in a statement that the US Arbitration Court confirmed the sentence against Dwyer after the discovery of a banned substance in his samples when detecting doping outside the competition during the months of November and December last year.
Dwyer, 30, said he was receiving treatment on the recommendation of a doctor and did not realize it contained testosterone. "Regardless of the verdict, I decided to retire to work full time."
Dwyer was part of the US team that won the 200m freestyle relay gold at the 2012 and 2016 Olympics and also won the bronze for the men's 200m freestyle at the 2016 Rio Olympics.