Although the TAB suspended betting during the massive plunges on the Warriors last week, it says the NRL coup was simply clever punting.

Prolific punters Eddie Hayson and Steve Fletcher were rumoured to have cashed in on information from Andrew and Matthew Johns that Andrew would not be playing in Newcastle's match against the Warriors last week.

But TAB Sportsbet spokesman Glenn Munsie says bookies just need to get the information before the punter.

"As a bookie you just have to be smarter than the punter with the information you get," Munsie said.

"I found out information Johns was doubtful. To protect the little punter who didn't have access to that information, we suspended betting and we reopened when we got news he was out on Sunday morning.

"Information was flying around, it wasn't hard to come by - plenty of information gets out there.

"This is not a sting like the greyhound was."

Hayson and Fletcher - who are in dispute with bookmaker Curly Seal over a $700,000 win on a Gold Coast greyhound race last year - were rumoured to have made $250,000 following heavy investments on the Warriors.

There was speculation that Andrew Johns had told Matthew he was likely to miss the match against the Warriors because of a neck injury suffered at training during the week and his brother then told Hayson and Fletcher.

NRL chief executive David Gallop said the league found no reason at the moment to investigate the betting coup.

"The league has clear rules around betting and the passing on of information and if there was clear evidence of a breach of rules we would certainly investigate further," Gallop said.

"I hardly think there's a problem with someone telling their brother they're injured."

The Johns brothers deny making any contact with Hayson or Fletcher and even if Matthew did speak to either punter, Gallop said the former player was not bound by any NRL regulations.

Hayson owns racehorse Regreagan with the Johns brothers.

While bookies Sportingbet and Colin Tidy lost significant sums on the last placed Warriors shock win over the competition leaders, Munsie said the TAB made money.

"It was the best result for the weekend for us," he said.

TABSportsbet took its first serious bet of $15,000 on the Warriors with a 16.5 points start on Friday afternoon.

Munsie believes the bets have only become an issue because they involved a high profile player like Johns and colourful punters who won a lot of money.

He says there were just as many unsuccessful plunges which don't make the news.

"I can assure you they back plenty of losers too," he said.

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