In written testimony, Michael Phelps said he was frustrated with the uncertainty of whether he was competing against clean athletes in Rio ahead of a congressional hearing looking at ways to improve the international anti-doping system.
“Rio was also unique because of increased doping concerns,” Phelps wrote in a 1,300-word letter, published ahead of his appearance at a congressional hearing Tuesday in Washington, D.C. “In the year leading up to the Games, there was uncertainty and suspicion; I, along with a number of other athletes, signed a petition requesting that all athletes be tested in the months prior to the Games.