Casey was part of the furniture at Northampton Town from 1985 until his retirement as first team physio in 2008.
First appointed to the role of physio by Graham Carr, he was the trusted medical man for a string of Town managers for a period of 23 years.
Casey saw was sat on the sidelines as the Cobblers went through many highs and lows, and here we publish a selection of pictures from his time with Town.
Pete Norton was the club photographer throughout Casey's time as physio, and captured him on many occasions over the years.
Here are some of the many images Pete has taken, starting with his first 'head shot' after he took the job 35 years ago.
9. Promotion party!
Denis Casey joins in the team celebrations after the Cobblers won promotion with the win at Torquay in May, 2000 Photo: Pete Norton
10. Town on tour
Denis Casey issues instructions to Paul Reid during a training session on the Cobblers' pre-season trip to USA in the summer of 2003 Photo: Pete Norton
11. Always ready to listen
Denis Casey chats to Martin Smith during a pre-season session at Abington Park Photo: Pete Norton
12. Passing on the baton
Denis Casey pictured with Stuart Barker, who would eventually take over physio duties at the Cobblers, more than 20 years after Denis had joined the club Photo: Pete Norton