The season's second major gets under way on Thursday, as the US PGA Championship starts at Southern Hills Country Club.

Despite being included in the field for the tournament in Tulsa, Oklahoma, reigning champion Phil Mickelson will not be on hand to defend his title.

Mickelson, who became the oldest player to win a major when he triumphed at the US PGA in South Carolina last year, is continuing his break from golf, which came after criticism over his comments regarding the Saudi Arabia-backed breakaway Golf Super League.

While the GSL cloud hangs over the heads of certain players who have requested releases from the PGA Tour, the focus this week will be on claiming the huge prize of a major title.

Tiger Woods is back, after his remarkable Masters return, while world number one Scottie Scheffler is on the hunt for another major title following his success at Augusta.

Stats Perform's experts have taken a look at some of the likely candidates.

No stopping Scottie – Ben Spratt

Only three men have won both the Masters and the US PGA in the same year, with Jack Nicklaus the last to do so in 1975. That is the esteemed company Augusta champion Scheffler hopes to be keeping – and you would be bold to back against him this season. Scheffler ended 2021 ranked 12th in the world and still waiting on his first PGA Tour victory. He has since won four times, including at the Masters, to become world number one and the clear man to beat. The 25-year-old has two top-10 finishes in both entries at this tournament and played a practice round at Southern Hills earlier this month to prepare himself for another tilt.

Scottie Scheffler is hunting history

Rahm makes timely return to form – Patric Ridge

World number two Jon Rahm will tee off in Oklahoma on Thursday on the back of winning the Mexico Open last time out. Rahm has finished in the top 15 in six of the 11 competitions he has featured in this season. Prior to his win in Mexico, the Spaniard's putting had been letting him down, but the rest of his game has been top-notch. Rahm's strokes gained off the tee is a PGA Tour-leading 1.311, while his strokes gained tee to green also ranks first (1.808). The 27-year-old finished T8 in this major last year and his best result was T4 back in 2018 – he could be celebrating back-to-back wins on Sunday.

First major to get Burns treatment – John Skilbeck

Sam Burns missed the cut at the AT&T Byron Nelson, but we should forget that; one bad round cost him and there have been very few of those this season from the 25-year-old. Besides, he followed that 73 with a gutsy 67. Admittedly, Burns also missed the cut at the Masters, but he has titles at the Sanderson Farms Championship and the Valspar Championship in the current campaign, successfully defending his title at the latter after a breakthrough win last year. He has achieved six top-10 finishes in the 2021-22 season, has banked almost $4.5million, and sits second in the FedEx Cup standings. The PGA Championship can throw up funky winners and Burns might just be ready to join the list. He has yet to challenge in a major but that surely must change soon.

Rory can end major drought – David Segar

It is eight years since Rory McIlroy won the last of his four majors at the PGA Championship, but the Northern Irishman can end that drought this week. He produced a late surge to finish second in The Masters, with a stunning Sunday 64. McIlroy is third on the PGA Tour for shots gained off the tee. His two scores of 68 over the weekend earned fifth place at the recent Wells Fargo Championship, setting him up nicely for another major challenge.

Rory McIlroy has enjoyed success in this major

Spieth slam? Oh, it's on… – Pete Hanson

Is this the week Jordan Spieth completes the Grand Slam? A tie for 71st and 30th in his last couple of attempts don't make for particularly good omens but Spieth is a player reborn. Having slipped as low as 92nd in the Official World Golf Rankings after last year's Farmers Insurance Open, Spieth has gone about climbing back into the world's top 10 and was back among the winners' circle at the RBC Heritage last month. A missed cut at the Masters was not the start he envisaged to major season but Spieth is at his best with his back against the wall and can firmly be in contention to lift the Wanamaker Trophy come Sunday.