Brooks Koepka has claimed that many of his fellow professionals cheat on the course - they just don't get caught. 

The golf star, who returned to the PGA Tour earlier this year after defecting to LIV Golf in 2022, opened up on the sneaky ways some professionals allegedly attempt to improve their games. 

He claimed that he has noticed his on-course rivals intentionally improving their lie in the rough during tournaments.  

The five-time major winner even admitted that he didn't report one of his rivals for an infraction, claiming that karma intervened anyway. 

'I've noticed a lot of guys do it, and guys get away with it more because you're not on top of them,' the 36-year-old explained during an appearance on Dan Rapaport's Dan on Golf show.

Koepka's former fellow LIV Golf star and longtime rival Bryson DeChambeau made headlines earlier this year when he was penalized during the Open Championship. 

DeChambeau was notified after his second round at the major championship that a breach had been flagged on the television footage. He quickly demanded to be taken by buggy back to the spot of the incident, where he erupted at two rules officials.

DeChambeau was visibly irate as he protested his innocence against what was later clarified by chief referee Grant Moir as an 'inadvertent improving of the area' behind his ball.

Footage of the original incident showed DeChambeau wading through the long grass before planting his right foot directly behind his ball – an act that flattened the fescue and would have allowed an easier backswing. 

Despite his protestations, DeChambeau was deducted a two-shot penalty. 

Koepka admitted that it was tough to police his competitors when often he is unable to stand watching over them while preparing to play his own shot. 

'So I might be over there hitting my shot, but you're over here in the left rough and guys definitely do it, but it's just how are you going to prove it?' Koepka added. 

The American went as far as to reveal that he had a clear line of sight during an unnamed playing partner's chip shot and insisted that he saw them improve the lie. 

'There's one I saw this year that was really bad,' Koepka said, trying not to smile. 'I'm not going to name the player, he's not playing in this [Skins Game], but it was pretty bad.' 

'It was a chip. I saw it. It was really bad. He went for the backswing and you could see the whole ball.'

However, he chose not to report it to tournament officials, explaining: 'I just ate that one because karma came and bit him on the next hole. 

'I think he made a double or a triple on the next hole so I was like what am I going to say? But it was interesting.'

On the decision not to report the alleged infraction, he added: 'What am I going to do? I can't prove it, and like at the same time, I understand guys have got to put the club down here, but if you keep putting the club down of course...'

Koepka is set to compete in the $4million Skins Game on Black Friday, alongside Justin Thomas, Wyndham Clark and Jackson Koivun.