My dad is 2 years diagnosed with it at just 63 and he was also a professional footballer, Everton youth, Wigan, Wrexham, Dallas Tornado's, Hong Kong 11 etc etc etc, it's getting worse every day.
R.I.P for your dad, sorry to hear it.
I'm sorry to hear that, please give your dad my best wishes.
In his early days after diagnosis my dad always blamed the footballs, he used to say it was like heading a brick back in his day.
We first noticed something was wrong with my dad back in 1997 when he started to go the wrong way round roundabouts, yeah I know scary, and he drove a 3 wheeler!! It turns out he had deterioration in part of the brain
that works your vision so he was seeing things out of place. Obviously he stopped driving but he remained active and up until he was 75 he still functioned pretty well. But then he had problems with his hip and couldn't get out much, that's when he started to rapidly go downhill.
My dad would then be like a car, you need to give him a jump start to warm him up so to speak. My husband used to go and talk to him and he'd struggle at first but after a while he would start to converse back. I think it's better to try and keep the brain active rather than idle. So if your dad has a hobby you can get involved in together that might help and it would make him happy too. It's so horrible but you have to cherish the early days.