Odell Beckham Jr. is officially a Baltimore Raven ... and the star receiver wasted no time making a pitch to keep Lamar Jackson in town following the QB's trade request.
The Super Bowl champ opened up on why he signed a one-year contract with B-More during Thursday's introductory presser ... saying Jackson was a big part of his decision.
"It's the elephant in the room," the 30-year-old said. "It wasn't about so much money, it wasn't about anything. It was about they showed they wanted me."
OBJ even partied with Lamar once his next move was announced .