DK Metcalf has been hit with a hefty punishment for his role in an altercation with a Detroit Lions supporter on Sunday ... with the NFL suspending the Pittsburgh Steelers receiver two games.
The penalty was announced on Monday -- the league said the ban was for "conduct detrimental to the NFL for initiating a physical confrontation with a fan."
The NFL noted Metcalf's actions violated policy ... specifying, "players may not enter the stands or otherwise confront fans at any time on game day and ... if a player makes unnecessary physical contact with a fan in any way that it constitutes unsportsmanlike conduct or presents crowd-control issues and/or risk of injury, he will be held accountable.