According to the ABC, Joe Pidik from east New Britain died last month after being struck in the head with a brick thrown by a support of the Mt Hagen Eagles.
Pidik had been driving past Sir John Guise stadium.
There had been a brawl inside the stadium that was sparked when an Eagles official punched the referee after the team's semi-finals loss to the Rabaul gurias.
Disgruntled Eagles fans swarmed the pitch and attacked Gurias players and fans.
Western Highlands Development Forum chairman Samson Komati says the conduct of the Eagles official and fans shamed everyone from the province, according to the ABC
He's calling on all Western Highlanders in Port Moresby to come together and apologise to Pidik's family and the Rabaul Gurias.