The NRL won't re-introduce the five-minute sin bin anytime soon, according to chief executive Todd Greenberg.

The procedure was removed from the game over a decade ago but amid accusations that a number of teams deliberately concede penalties on their try line there have been calls for it to return.

Brisbane coach Wayne Bennett and St George Illawarra's Paul McGregor led the chorus over the weekend saying the intentional approach to give away repeat sets was a scourge on the game. But the game's new boss is adamant the five-minute penalty won't be coming back any time soon.

"These things were talked about at the competition committee last year, and it is not on the agenda," Greenberg told AAP.

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His declaration comes after senior player Robbie Farah egged the governing body to look at harsher penalties for reportable offences, particularly when the affected team loses a player for the game.

"I think in general we've forgotten the sin bin," the Wests Tigers rake said.

"There are a lot of professional fouls that go unpunished these days. I'd like to see the sin bin take a bit more significance in the game, whether it's five or ten minutes."

- AAP