Jamie Skinner, 13, had a suspected heart attack and collapsed during his debut for Tynecastle FC under-14s team at Saughton Sports Complex, Edinburgh, last December.
He was still alive when emergency teams arrived at the scene and rushed to Edinburgh Royal Infirmary, but his life could not be saved.
Documents later revealed an apparent series of failures in the run-up to the tragedy.
Now his family has launched a campaign to ensure life-saving defibrillators are installed at sports centres.
Jamie's brother, Tony, said: "He was grateful for everything he got. We are never going to forget what happened. What we want most of all is to keep Jamie's memory alive."
According to the British Heart Foundation, about 60,000-out-of-hospital cardiac arrests take place in the UK every year.
It says more than 600 apparently fit and healthy people under 35 die throughout the country every year from undiagnosed cardiac problems. Many of these deaths are easily preventable, but every minute without CPR and defibrillation reduces the chances of survival by 10 per cent.