Here's the most fighting the Rams did all night Monday ...
The game was wild ... the Rams couldn't stop Lamar Jackson at all in a 45-6 blowout -- and when Peters started ballin' out, he trash-talked Jalen like crazy.
Cameras caught the Ravens cornerback screaming across the sideline at Jalen ... and then they later filmed him mocking Ramsey's celebration after an interception.
It all spilled over into a near brawl at midfield after the final whistle ... when the two were in a heated screaming match.
Eventually, the guys were separated -- with Ramsey having to be essentially carried all the way to his locker room up the tunnel at the L.A. Coliseum.
At one point, Peters reportedly told Ramsey, "[We] kicked y’all ass out the playoffs."
Unclear why the two have such bad beef -- although it seems Peters is pretty pissed after the Rams traded him to Baltimore last month and then acquired Jalen only a few hours later.
Peters did NOT address the media after the incident ... and Ramsey refused to take questions from reporters over it all, saying, "I ain't going to answer no BS."
As for their team's standings ... Ramsey's Rams are pretty much dead after Monday's L -- while Peters' Ravens are now the Super Bowl favorites.
Must've been a pretty fun plane ride back to Baltimore!