The Steelers beat the Jaguars in a 16-15 pre-season thriller on Saturday night and the fans were all worked up.
In a clip circulating on social media, spectators could be seen exchanging heated words, and then eventually punches, sparking a mass fight in the stands.
S.A.F.E Management, the company that handles security at the stadium, had to step in and break it up.
Undrafted rookie Tyler Snead scored the game-winner with just under two minutes remaining in the fourth quarter.
Have you ever gotten into a fight over sports?