Joining Bryson DeChambeau, Justin Thomas hit the second ace of the day on No. 16.
After Jon Rahm put his ball within two feet of the pin, Thomas landed his tee shot on the slope and the ball rolled left into the cup.
“It was actually funny. Right when I hit it, Phil and I were kind of walking off together, and I said jokingly, how about a 1, Phil?” he said. “ And it kind of disappeared and he kind of looked at me and I looked at him, and I said I can't believe that actually went in.”