IN the most unlikely of places, another black eye for rugby league's centenary season. Not in a pub, a fast-food outlet or even on the streets of Kings Cross - this time the damage was done in the middle of a mosh pit at a concert by the rock band Korn.

Four Cronulla Sharks players were interviewed by police yesterday after a man alleged he had been punched by one of them during the concert at the Sydney Entertainment Centre on Sunday night.

Ben Pomeroy, Dustin Cooper, Jacob Selmes and Brett Kearney, all first graders with the club, spent several hours at City Central station. They have denied any wrongdoing to club officials and left the police station without being charged.

A 24-year-old was treated by paramedics for facial injuries, but was not taken to hospital. He alleged he was struck in the face by one of the players.

Cronulla's chief executive, Tony Zappia, said last night the players had gone voluntarily to the police station accompanied by football manager Steve Litvensky.

"I spoke to all four of them just quickly," Mr Zappia said. "I just asked them if anything happened and they said no more than anything that normally happens in a mosh pit. They said they had nothing to hide. They don't know what they're supposed to have done.

"They went from training straight into the police station. They went in their training gear - it's probably a bit like the Bulldogs, not suitably attired, but they were that keen to clear their names.

"They just jumped in the car and all went in together."

A police spokesman confirmed no charges had been laid over the incident, which happened about 11.45pm, but investigations were continuing.

"It is alleged a 24-year-old man was approached by a male who hit him to the face with his fist," the spokesman said. "Ambulance officers arrived soon after and the man was treated."

The code has been rocked by several off-field incidents during the centenary season. The most serious was Parramatta's Test and Origin star Jarryd Hayne being shot at in Kings Cross.