28-year-old Rahm had seven PGA Tour victories, and eight on the European Tour before the season debut in Hawaii.
And while a couple of the Spaniard's previous wins were impressive - including the 2021 US Open and the European Tour Finals in Dubai in November - the question is whether his effort in Hawaii tonight is one of the more remarkable.
Morikawa had a big lead
Because the scene change that took place during the final round of the Tournament of Champions was truly something out of the ordinary.
Namely, Rahm was seven strokes behind leading American Collin Morikawa (who had a six-stroke lead down to a trio sharing second place) when the day began.
When Rahm then started with a bogey in the final round, while Morikawa started with a birdie, the distance was suddenly nine shots.
- It was a little crazy day, I won't lie about that.
It was like... "We need a little miracle".
"So after bogeying the first, I needed an even bigger miracle," Rahm said on the PGA Tour's website.
Ten under par in the final round
And so it became.
When Rahm had finished playing the 18 holes, he was listed for 63 strokes, ten under par.
At the same time, leader Morikawa, who did not hit a single bogey in his first 67 holes in the competition, had a much harder time with three straight bogeys on holes 14-16.
And when Rahm birdied the 18th and final hole, Morikawa had to hit an albatross on the final hole.
Morikawa was second
He didn't.
Thus, Rahm's victory was complete - and Morikawa "only" finished second despite his huge lead before the round,
"This is going to hurt, but I'll get over it because we're very early in the season," he told NBC.
Rahm was all the happier:
- I was lucky, the golf gods were on my side, he said at a press conference afterwards.