
25. Pittsburgh Steelers vs. Cleveland Browns (2021)
This was a dismal defeat for Pittsburgh because their season began so well. They won their first 11 games of 2021 but this was misleading. Analysts consistently claimed that they were lucky to scrape through games. Finally, results caught up with them as they lost four of their last five.

Fortunately, they had done enough to make it to the playoffs. However, they faced a resurgent Cleveland Browns at the worst possible time. Ben Roethlisberger had the worst game of his career as he threw four interceptions. It was a humiliating and soul-crushing day at the office for the franchise (via Sporting News).