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.

As for the mood — those at the restaurant say Sherwood and his friends were very friendly and approachable.

This, of course, is the second time a New York superstar has hit up the famed eatery to celebrate a momentous contract … you’ll recall, back in December, Juan Soto also chowed down on some meat and champagne at the restaurant after signing his $756 million Mets pact.

There’s a good chance both make it back, too … as after putting pen to paper — the guys are now locked into contracts with their respective New York franchises for the foreseeable future.