College football star KD Davis is celebrating the start of his NFL rookie season just a little early ... recently coppin' a diamond-filled shark pendant!!!
TMZ Sports has learned the senior linebacker out University of North Texas hit up Atlanta's Scoobie the Jeweler in December to make a piece that resembled his love of the game.
"He's a shark at what he does," Scoobie told us on Friday, "relentless in his passion for football."
The final piece came out awesome ... you can see the massive pendant looks just like the villain from "Jaws" with its fangs and dark eyes.