After 12-years away from management, Roy made his sensation return to take over at Stade Brestois in 2023.
Despite the club’s shoestring budget, he managed to take them to the Champions League in 2024-25 after finished third in Ligue 1.
The achievement of taking them to Europe’s premier club competition for the first time in their history earned Roy the Ligue 1 Manager of the Season award in 2024.
Roy was battling pancreatic cancer for the past three-and-a-half years and had kept his health issues a secret from the public.
A statement released by the club read: “It is difficult to find the words to express all the sadness we feel following the passing of our coach Eric Roy.
“The President, the management, and the entire Stade Brestois 29 share the pain of his family, his wife, his 2 children, as well as all his loved ones.
“Eric Roy was an inspiring person who brought so much to Stade Brestois. Loved and respected by the supporters, he helped write the most beautiful pages in the club's history and enabled it to reach a historic level.
“So many things could be said today, but above all, it is the emotion and grief of losing a loved one that overwhelm us.
“Eric, we will never forget everything you brought to the club, nor the man that you were. You will remain forever in our hearts and in the history of Stade Brestois 29.”