Frank Mir reveals positive 'B' sample following USADA violation, questions lab integrity

Matt Roberts-USA TODAY SportsFormer Ultimate Fighting Championship (UFC) heavyweight kingpin Frank Mir was recently flagged for a United States Anti-Doping Agency (USADA) violation, which occurred in the wake of his UFC Fight Night 85 loss to Mark Hunt last March in Australia.

Mir, however, is adamant that he never knowingly ingested any sort of performance-enhancing drug (PED), and wondered aloud if the kangaroo meat he's been ingesting (yuck) was responsible for the traces of oral turinabol metabolites, classified as an anabolic steroid.

Either way, his "B" sample was tested and corroborated the results, according to Mir's comments on Phone Booth Fighting (via MMA Fighting):

"I went through…