Punchdrunk or just a plain drunk? From the colour of his bulb and some of the "an evening with Carl Froch & George Groves" clips I've seen I'd sway toward the latter
Few people bring up Chris Kamara. He's looked into it and seems it's a under active thyroid https://www.manchestereveningnews.co.uk/news/showbiz-news/chris-kamara-opens-up-health-20857837
Just listened to Gary Sykes on Tris Dixon's podcast, he sounds awful, can't say I remember what he sounded like back before he'd been in hard fights but it's one of the worst examples of punchyness I've heard
If you put our sport under the spotlight ( oh dear ) its a bloody miracle that ALL boxers are not punchy, lots of the fighters have 10/15 years ( some a lot longer ) of ring activity, which comprises of mostly, being hit on or around the head, why are not surprised that some have not got dementia ? if you then factor in the amount of sparing some fighters would do in that time frame !!! Over the last 30 years or so, I have met and spoken to dozens of ex boxers, and sadly to say a huge majority have some form of dementia or slurred speech, or slowness of thought, no wonder at it, its a hard " sport " to justify on lots of levels. keep well.
Agree on Quigg and Mitchell they sound awfully punchy. Quigg isnt the brightest spark, he mustve done far too much hard sparring at the wild card gym.