It has been nine years since Woods last won a major, the 2008 edition of the US Open.
The 14-time major champion will turn 42 on December 30 and his likely schedule is yet to be confirmed, however, there were enough positives from the four rounds to suggest Woods can be a regular contender again.
"Right now it's easy to think he can be Tiger Woods again and be the best in the world, but that would be a stretch for him", Harmon wrote.
Starting the day seven shots behind Charley Hoffman, Fowler birdied his first seven holes to ultimately shoot an 11-under 61 to win by four shots at 18 under.
"I've got to be honest, I really like the way Tiger is swinging the club", Harmon wrote.More news: Why is Trump calling Elizabeth Warren Pocahontas?
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Harmon said he was encouraged by two things: Woods has his swing speed back and seems to have total freedom in his golf swing - "I don't see any of the up-and-down movements that he used to put in there", Harmon wrote. - and Woods is pain-free.
Global sporting icon Woods led for a short time during the second round and offered a demonstration of why he became a golfing great with a huge drive onto the green before holing a tricky putt for an eagle at the 350-yard par-four eighth in his final round Sunday.
Woods underwent a fourth back surgery last April and made headlines when he was arrested near his Jupiter, Fla. home for driving under the influence.
"I don't know what golf courses I'll be playing and what's the best way to go about it", he added. "I showed some good signs", he said, adding that they pointed toward "a bright future". "Nobody was sure how far he'd hit his iron shots, but I think he's done pretty well with that too".
World No. 1 Dustin Johnson finished in a tie for 14th at 288 after a final-round 72.