The Australian tied for seventh in the latest PGA Tour event, behind winner Daniel Berger, for his equal best finish this season.

Four sub-70 rounds across Pebble and Spyglass Hill, including a closing 69, were a welcome return to form for Day after missed cuts at his past two tournaments.

Incredibly, it was an eighth top-10 of Day's career at Pebble Beach, although he is yet to win at the famed California course.

More importantly for the 33-year-old than his ball striking and brilliant short game is how his body is holding up.

Injuries have hampered Day's career and he is working on changes to his swing with his new coach Chris Como to place less stress on his troublesome back.

Tweaks Day thinks will help keep him pain free and prolong his stay on Tour.

"I feel like I've kind of set myself a goal where I want to play to 50 now because I feel good with my body," Day said.

"I was hoping I was going to get to 35.

"I feel like I've kind of set myself a goal where I want to play to 50 now because I feel good with my body." – Jason Day

"The way that I've been feeling lately, the way that my body is feeling, the way that I'm moving, I'm moving a lot better, the stuff that I'm trying to work on my swing is helping my back out as well.

"... I feel very positive and I feel like things are moving in the right direction for the first time in a long time.

"I know that I'm 33 now and I've got a lot of years left as long as I want it in my head."

While Day continues to chip away in search of a first win on Tour since May 2018, Berger stormed to a two-shot victory with two eagles in a round of seven-under 65.

The American, with a total of 18-under-par 270, won for the second time since the PGA Tour returned to golf from the COVID-19 pandemic last year and for the fourth time overall.

Maverick McNealy made five birdies on his closing eight holes for a 66 to finish second.

Overnight leader Jordan Spieth (70) tied for third at 15 under along with Patrick Cantlay (68).

It was Spieth's second top-four finish in as many weeks, a strong sign that his game is coming back after a drought that dates to his 2017 Open Championship victory at Royal Birkdale.

Of Day's fellow Australians to make the cut at Pebble Beach, Cameron Davis was next best with a 68 lifting him to a share of 14th while Cameron Percy (70, tied-21st), Matt Jones (71, tied-34th) and John Senden (73, tied-39th) had their moments this week.