The American 1500m and 5000m record holder, Shelby Houlihan, has tested positive for Nandrolone (androgen/anabolic steroid) and is staring down the barrel of a four year ban. She tested positive for the banned substance in an out-of-competition drug test in December 2020.  Houlihan is claiming that she is innocent and is blaming the positive test on a burrito she ate 10 hours prior to the test, that contained pork.