He played college golf at the University of Texas and won the 2012 NCAA Championship with teammates Dylan Frittelli and Jordan Spieth.

At the 2016 United Leasing & Finance Championship, Gribble was leading by one shot with two holes to play, but after a bogey-bogey finish, he ended the tournament T2, one shot behind eventual winner Séamus Power.

[2] Gribble became the 13th left-handed golfer to win a PGA Tour event and the first since Greg Chalmers won the 2016 Barracuda Championship.

[citation needed] Gribble gained media attention at the 2017 Arnold Palmer Invitational at Bay Hill when he tapped an alligator on the tail that was sunning itself on the 6th fairway during the first round of tournament play.

The alligator quickly scampered unharmed into a nearby pond.