Jamien Sherwood celebrated his new New York Jets contract in the most linebacker way possible ... by engorging on an enormous cut of steak!
TMZ Sports has learned ... just two days after the 25-year-old agreed to sign a new $45 million deal with the Jets -- he and some pals hit up the world-renowned Benjamin Prime in NYC to rejoice.
We're told the footballer and his group all feasted on some signature porterhouses -- which Sherwood enjoyed with a medium temp.