Jameis Winston is taking his offseason training to the streets -- literally -- pushing a 5,500-pound SUV up an incline ... in an effort to remind NFL teams he's still a beast!
The 26-year-old just lost his job in Tampa Bay to some old guy ... and while his agents work on getting Winston a deal with another squad, Jameis decided to put in some work!
We did some research ... Winston is pushing a 2020 Ford Expedition -- which weighs between 5,500 and 5,800 pounds depending on how tricked out it is.