A Ravens fan went way too far after his team's win over the Commanders, knocking an opposing fan unconscious… and Baltimore police are investigating the violent altercation.

The incident, which was captured on video, shows a fan wearing one Lamar Jackson Jersey walking toward two people wearing commander's gear. Then, seemingly unprovoked, he begins punching the men, landing a devastating right hook to the face of a fan carrying one Sean Taylor jersey, which threw him to the ground.

The attacker then turns his attention to the other fan wearing one Terry McLaurin jersey …chasing him and slamming him into a building wall. Luckily, the man was apparently able to escape before suffering any further damage.

Seemingly proud of his cowardly deception, the man screams into the camera: “I’m not losing!”

Unfortunately for the guy, he might end up getting an L… because even though there have been no reports or calls, the cops tell us they are aware of the video circulating on the internet and that they are following up Search information.

“Detectives are actively investigating the video,” a police statement said TMZ Sports. “Anyone with information regarding this incident is asked to contact the Southern District at 410-396-2499 or Metro Crime Stoppers at 1-866-7-Lockup.”

The person's identity has been speculated on the internet… but has not yet been verified by police.