"That [alleged] conduct was cowardly and despicable. It doesn't get any more serious without someone dying. It was [allegedly] a blind shot attack."
Mason said the injured player would not be the same again and doubted he would ever play in future.
"Players of our team on the field said they heard his jaw crack. I've seen the medical report and his jaw is broken in four places or three at the very least."
The injured player was taken to Whangārei Hospital in an ambulance while police spoke to witnesses at the venue.
Tikipunga Football Club executives met at noon yesterday to discuss the issue before releasing a short statement.
"Tikipunga AFC takes all accusations of unsportsmanlike behaviour by their players very seriously. As such, we are investigating in conjunction with Northern Football Federation
and will be taking appropriate action," club secretary Mel Worth said.
Whangārei police couldn't confirm whether any charges have been laid.