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.
This is a mistake bettors make, I have fallen for it in the past and I lost some decent money. Mine was on sports betting where I played some teams based on their performance the previous season, I was confident they were going to play as predicted but it did not work as some of them even lost their matches. After a long break, it is very important to observe the players first to see how their are in terms of physical strength and technical skills before betting on them.