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.
5. Assessing the problem
Denis Casey treats David Longhurst during a training session at the old British Timken site in Duston Photo: Pete Norton
6. Wembley winner!
Denis Casey shows off the play-off trophy following the Cobblers' dramatic 1-0 win over Swansea City in 1997 Photo: Pete Norton
7. Setting the pace...
Denis Casey takes to two wheels as he leads a pre-season running session on the old athletics tracks at Sixfields Photo: Pete Norton
8. Feeling the tension...
Denis Casey (right) pictured alongside (from left) Kevin Wilson, Kevan Broadhurst and Richard Hope in the final minute of the 2-1 win over Torquay in May, 2000 Photo: Pete Norton