NFL player Jeremy Kerley was suspended last month after testing positive for a performance-enhancing drug.
A month later, still confused about his test results, Kerley said he now believes a ghost "tainted his pee".
"I don't know," Kerley said when asked how a banned substance got into his system. "There's a lot of ghosts around here".
"Ghost put it in there. You know, the ghost of Christmas past? … I don't know."
At the time of his suspension, Kerley said he was "shocked" to learn he tested positive for Turinabol, an anabolic steroid, and that he never "knowingly" had taken.