The numbers were baffling to Michael Phelps. Before a Congressional hearing in Washington on Tuesday, he recounted being drug tested 13 times in the leadup to the Rio Olympics.
Many of his peers, though, did not face that same testing.
According to an Independent Observer report from the World Anti-Doping Agency, 1,913 athletes in 10 high-risk sports had no record of testing in 2016. Swimming, track and field and weightlifting are among those considered high-risk sports.
But the number is actually higher.
That same report noted 4,125 athletes — out of 11,470 confirmed entrants in the athletes village the week before the Olympics — had no record of testing last year before Rio.