Cheat Fernando Tatis Jr. offered a ridiculous excuse for failing his drug test: Tatis said he inadvertently took the anabolic steroid Clostebol to treat ringworm instead of synthetic glucocorticoid corticosteroid Clobetasol. Both require a script and are not handed out accidentally by your local pharmacist. Tatis just thought everyone would be stupid enough to be confused by the close spellings. JP Sears was not.