Finau recovered from an early bogey to card a five-under-par 67, while halfway co-leaders Stenson and Rahm shot matching 69s at Albany on the island of New Providence. He was four over for the round after two holes, got it back to even par at the turn and had to settle for a 72.
"If you get wind all day, you don't expect people to low", Rahm said. "Didn't seem like much could go wrong".
Even though this tournament takes place outside of the heart of golf season, and only features an 18-player field, the win was still special for Rahm thanks in large part because the event was hosted by Tiger Woods.
Woods was 5 under for his round and trying to stay in the thick of his holiday event when he drove into a palm bush on the 18th hole.
Woods eventually walked off with a double-bogey six that, after a flawless prior 17 holes, left him with a three-under par 69 for a two-under par total.
But questions arose about this shot out of the bush.
"That's what you have to do to play well, so I was able to do that today".
"Looking at in the regular speed on a high definition television, you couldn't tell that at all", said Mark Russell, the PGA Tour's vice president of rules and competition. "But there's no way he could tell that".
Patrick Reed went from equal first to almost last with a 77 that left him eight shots back at Albany in the Bahamas.
"At the same time, three-under (on Saturday), tied for the lead, I would have taken it at the start of the week".
Henrik Stenson and Jon Rahm—along with Tony Finau—set up a wide-open conclusion that could feature more than half the 18-man field
Advantage Finau, at least over the last two days.
"Hats off to John this week, he played incredible golf and he deserved to win this week".
"It's a little bit of a battle at times". I'm feeling all right. Keep doing birdies and just keep going on.
Everyone was under par going into the weekend, with Jason Day bringing up the rear at 1-under 143.
Par or worse for Finau would have seen Rose move back above Brooks Koepka after weeks of flip-flopping for top spot with the American.
Woods was hopeful of much better considering how he struck the ball, though he missed plenty of chances.
"This entire year has been fantastic", Woods said after the tournament.
Rahm figured out the secret to that. "But I don't think he believed me really". "It was like a well-oiled machine".More news: Radio station drops Baby it's Cold Outside from Christmas playlist