-- Nose tackle John Jenkins celebrated a milestone Friday: the first contract extension of his 13-year NFL career. The Baltimore Ravens announced the one-year extension with Jenkins after Friday's practice. 11 run defense after Pro Bowl defensive tackle Nnamdi Madubuike (neck) and defensive end Broderick Washington (Achilles) suffered season-ending injuries. This is the second contract extension for a Ravens interior lineman in the past three weeks. With the uncertainty surrounding Madubuike's future, Baltimore signed defensive tackle Travis Jones to a three-year, $40.5 million extension on Dec. 11.