Deadspin does some quality reporting here.
A Google image search didn’t turn up any results beyond the same photo being shared on various college football forums, so Deadspin asked one source that might be in the know: The University of Florida. A spokesperson for the school’s athletics department said that McElwain, who became aware of the photo over the weekend, was not the man in it. “He’s told us it’s not him,” the spokesperson said.
It’s not a directly personal denial, though. That leaves the door wide open for Clay Travis to raise an annoying question at SEC Media Days. Maybe he could ask McElwain if the shark was a virgin.