Earlier this month, Gay revealed he had tested positive in an out-of-competition test he took May 16.
Three people familiar with the case told the AP that Gay had multiple positives this year.
One of those people said one positive came at nationals and the US Anti-Doping Agency has notified him of that result.
The people did not want their names used because the doping case against Gay is ongoing and the details have not been made public.
Gay’s representatives did not immediately respond to attempts by the AP to reach them.
