Rahm had said earlier in the week he doesn't think he can be beaten when he is firing on all cylinders, a belief by most top players.
Jon Rahm has big finish for 65 and the lead at Bay Hill
Rahm holed a 45-footer on the 14th, and then hit 8-iron - “Probably the best swing of the week," he said - over the bunker to tap-in range for birdie on the 16th.
Jon Rahm holds on to win at Riviera and return to No. 1 in world