Detroit Lions linebacker Derrick Barnes agreed to a three-year, $25.5 million contract extension with $16 million of the deal fully guaranteed at the signing, multiple media outlets reported Friday.Barnes was limited to just three games last season before tearing the MCL and PCL in his right knee in Detroit’s win over the Arizona Cardinals on Sept. 22. He was cleared by the Lions doctors last month.Barnes, 25, recorded a career-high 81 tackles and one forced fumble in 2023.