World Cup winner's son fears he'll get dementia like dad - as game 'swims in millions'
![World Cup winner's son fears he'll get dementia like dad - as game 'swims in millions'](https://i2-prod.mirror.co.uk/incoming/article30848994.ece/ALTERNATES/s615/1_tm100312nobby2.jpg)
John Stiles, the son of England World Cup winner Nobby - who died of dementia in 2020 - is campaigning to educate current players about the dangers of heading balls