O’Sullivan says contaminated supplement caused positive test

A contaminated supplement has been cited by Brendan O’Sullivan as the reason why the Kerry footballer failed a doping test last year.

News of the positive test and the identity of the player only broke on Saturday when Kerry confirmed that the Valentia man had served a suspension, which supposedly was less than a 12-month ban, arising from a test following the Division 1 final.

He admitted that there was a banned substance in his urine sample.