Sometimes an old athlete may want to come back for some special match. Some bettors might still bet on him despite of old age and lack of recent experiences in the sport. That is because of what we call nostalgia. They might recall the past memories or past performances of the athlete that may not necessarily reflect the recent performance of the athlete. So be careful when betting because you might just be nostalgic.
It's hard to assess his condition. I will have to rely on his last fight and his training for me to get it if he's competitive enough to be back in competition.
I'm not the kind of bettor who will just bet because he is good a few years back, there's a thing called rust and his condition may not be at par on what the current competition is demanding, I will give a benefit of a doubt but he should show something and that something should be convincing for me to bet on him.