The family of a teenager who collapsed and died while playing football are setting up a trust in his memory.
Cardiff City fan Huw Thatcher, 15, died last month from a brain aneurysm after collapsing while playing for his under-15s team in West Yorkshire.
His father Nick, who is from Cardiff, was one of the coaches and attended to Huw before he was taken to hospital.
The family has now formed a trust in his name to help those left disabled from brain injuries.
Mr Thatcher said his son's condition was undetectable.
"It a condition where there's no symptoms at all, you just function normally," he said.
"It's just a weaker area of a blood vessel. Sometimes in a person's life that weak area gives way and you have a haemorrhage. For some people it never gives way.
"It happened while he was playing - he collapsed on the pitch when he was kicking the ball. It didn't happen as a result of any contact.
"It could've happened while he was asleep or in school."
Mr Thatcher, Huw's mother Jenny and his sister Carys, 13, came up with the idea of setting up a trust in his memory.
"Basically, it's to remember Huw in a positive way and to help brain-injured people," said Mr Thatcher.
He said his son, who lived in Holmfirth in West Yorkshire, could easily have been left severely disabled from his condition so it seemed an appropriate cause.
The Huw Thatcher Trust will support the Disabilities Trust charity, in particular its Brain Injury Rehabilitation Trust division.
It will also support a Leeds-based facility - Daniel Yorath House, a residential rehabilitation service for people with acquired brain injury.
Daniel Yorath, the son of the former Wales football manager Terry Yorath, died from a heart condition at the age of 15 while playing football with his father.
Mr Thatcher added: "Huw was an outgoing lad who knew loads of people, and loads of people have been in touch with us about it [the trust].
"We haven't got a target and we don't know how far it will go but I'm sure we will raise tens of thousands."
Huw's friends and family attended Cardiff City's Championship game against Derby on Saturday as guests of the club.
The Bluebirds donated 100 copies of the match programme for his friends to sell to raise cash for the trust.
The club also gave Huw's Hepworth United team-mates Cardiff City kits to play in for the rest of the season in tribute.
Many mourners at Huw's funeral last month wore casual clothes or football shirts as a mark of respect.
The teenager was carried into the church in a blue coffin - his favourite colour and the colours of Cardiff City, with three football scarves placed on top.
The following Sunday, matches in the Huddersfield Junior League observed a minute's silence before their games.