Which player can complete the 'Chubby Slam' in Atlanta?

Agent whose stable has won the year's first three majors tells James Corrigan what shape his men are in heading to USPGA

"The Chubby Slam" may sound like a canvas-rocking tactic employed by the likes of Giant Haystacks in the Seventies wrestling scene but, in fact, it could be the most remarkable achievement in the history of British sports management.

If one of the nine players overseen by ISM prevails at next week's USPGA Championship it will mean that this agency in Cheshire has won all four majors in 2011. The boss is one Chubby Chandler, for whom the description "larger than life" seems invented. He sat down with i to outline their chances of landing the dream four-timer at Atlanta Athletic Club in a week's time.

Darren Clarke

"I think Darren will play great. He should be over the tiredness and the Open hangover by then. Last week's Irish Open was a tough week for them. It was for all the Irish boys. They are flogged at the event.

"Darren's said himself, he has to rediscover the mood he was in at Sandwich, when he could not be fazed. That used to only happen once every three years, but now he's got a Claret Jug it may well happen more. He has nothing to worry about and could be dangerous in that mood. Don't forget Mark O'Meara was in his forties when he won his first major. And then followed up very quickly."

Lee Westwood

"After more than a decade of electing otherwise, Lee is finally seeing a sports psychologist in Bob Rotella and I think it will do an awful lot for him. When you keep on doing the same thing, you get the same results. You can't expect anything else.

"Certainly, nobody in the game deserves a major more. Look at his record. Before Sandwich he had finished in the top three of five of his previous seven majors. That's incredible consistency. Believe me, it'll be his time soon."

Rory McIlroy

"Of course, he has a big chance at Atlanta Athletic Club. The course is absolutely perfect for him. It appears to be the old traditional American course, like Quail Hollow, where he won and, of course, Congressional. The only thing we might worry about is the bent grass on the greens.

"He's exactly where he should be mentally. Usually he plays his best golf at the start of a run rather than the end. He'll have to do it the other way around now because the USPGA will be his third in a row. But he's well capable of doing that.

"I'll be able to tell instantly if Rory's right or wrong and how well he will do – by his demeanour."

Ernie Els

"No doubt Ernie can take a bit out of what Darren [Clarke] achieved at Sandwich as my other big man is actually a year younger. But he's got to settle down on the course. If the putter works Ernie's a different person. I was with him in Portugal earlier this week and he's a lot better than he was.

"If he has a good week in Akron, he'll have a good week in Atlanta. And vice versa. The immense talent is still there and Ernie has one or two big ones left in him. I'm sure, he has."

Louis Oosthuizen

"Some daft things have happened to Louis since he won the Open. Falling down potholes, eye infections, viruses... then this week being involved in a car crash. He's never been able to get into a run of form. Golf's all about rhythm and the circumstances haven't allowed any for Louis.

"Saying that, Louis does need pushing now and again. We had a go at him in Wentworth and now it's probably the time again.

"He and Charl are very close but they're chalk and cheese. The only thing they have similar is the way they talk and they happen to be major-winners. And ISM, of course."

Charl Schwartzel

"I think he'll contend. Actually, he'll soon be one of the best players in the world. Charl is underestimated, but, in a funny sort of way, that'll suit him.

"You need three majors to become a legend and I am certain Charl will get at least to three. He is the full package."

Grégory Bourdy

"He's a driven Frenchman, who will do almost anything he needs to do to make it. At the Open this year he ate every night with Lee and Darren, and Louis and Charl. Simon was there every night as well.

"I'm telling you, it's great to be around success. It's infectious."

David Horsey

"It will be interesting to see if he is long enough, but this will be great experience for him. 'Giddy', as we call him, as in 'giddy-up', needs to make the cut, have a proper week and come to terms with how good he can be. He's a good solid player who could have a great future."

Simon Dyson

"I think Simon's due to get into the mix in a major, to get in there where it hurts. At the Open he did great, coming under the radar to finish tied for ninth.

"He was obviously a good bet for last week's Irish Open, but nobody realised until he won. The next step for Simon is to get in there, 36-hole lead, and see how it feels. He is a great iron player and knows how to get over the line."