New Year, New Phil Mickelson

The veteran didn't divulge numbers, but it was clear he had lost a significant amount of weight over the holidays as he looks to extend his playing career.

At 52-years-young, Mickelson has 'been there and done that', scooping six majors and no less than 45 PGA Tour wins. As such, it was a surprise to many when the stalwart joined the controversial LIV Golf wantaways.

Sitting down with the press at the Royal Greens Golf & Country Club ahead of his return at the Saudi International, Mickelson, unsurprisingly, fielded many a question about his weight loss.

"I have a whole different energy, whole different excitement," said the American, as per foxsports.com.au.

"I've been rejuvenated. Best shape I've been in in a long time. I'm back to my college weight. It allows me to recover faster after I play.

"It's my college weight. We don't need to go to numbers, but I'm back to where I was when I turned pro. That's the first time that's happened."

As for what the future holds for Mickelson, he revealed he is targeting more major wins - and perhaps a career Grand Slam if he gets over the line at the US Open - and LIV Golf events.

"The tournaments where you are going to leave a mark are the majors," said the San Diego native.

"That creates a life memory. If I win another Tour event, who cares? It's not like it's going to do anything for how I look at my career. Another major would be a unique, special moment.

"That's really where I want to thrive. And sure, it would mean a lot to win some LIV events because of the role I've played as it's been created."