The defending Super Bowl champion Philadelphia Eagles announced a multiyear extension on Monday with head coach Nick Sirianni.Sirianni, 43, has compiled a 48-20 (.706) record in the regular season through his first four seasons. He is 6-3 in the playoffs with two conference championships.”As an organization, we have always strived to create a championship culture of sustained success. Nothing is more important to fostering such an environment than having tremendous leadership,” Eagles chairman and CEO Jeffrey Lurie said in a statement.”Nick has embodied everything we were looking for in a head coach since we hired him four years ago. His authentic style of leadership, football intelligence, passion for the game, and growth mindset have helped to bring out the best in our team. I am excited for what the future holds for the Philadelphia Eagles.”Terms of the deal were not disclosed. Sirianni earned a reported $7 million per season under his previous deal.Last season, Philadelphia won its second NFC East title in three years and defeated Kansas City 40-22 in Super Bowl LIX in New Orleans. That avenged a 38-35 loss to the Chiefs in Super Bowl LVII.