Viliami Halaifonua, also known as Willie, died in July 2013 in Auckland City Hospital after collapsing at a rugby match.
Halaifonua, a father of two young children, had been playing a senior game of rugby between Takapuna and Massey at the Onewa Domain, Takapuna, on July 20.
The report says that Halaifonua was very prominent in the match, running the ball up several times in the rucks and mauls.
''There was no obvious point in the game were Mr Halaifonua could have been seen to sustain a head injury,'' the report said.
''For all intents and purposes, his play and response on the field was unremarkable and not unlike many of the other players.''
However, about 10 minutes before the match ended, Halaifonua has again run the ball up the field and clashed with a Massey player.
The clash has resulted in the Massey player becoming semi-conscious on the ground. At that point, the referee stopped the game to check on that player's welfare.
''Mr Halaifonua appeared to be fine and unfazed by the clash.''
Halaifonua's team - Takapuna - gathered together to discuss the last few minutes of the match. The report indicates that again, Halaifonua appeared to be fine at that point.
However, minutes later, Halaifonua dropped to the ground.
''The game concluded and as the teams were lining up to go through the formality of shaking hands with each other, it was noted that Mr Halaifonua dropped to the ground on his knees and then collapsed into a semi-conscious state.
''Mr Halaifonua was struggling to regain consciousness going in and out several times. At one point, he was witnessed to be experiencing a seizure.''
