The most stunning visual in the first episode of "Hard Knocks" wasn't Aidan Hutchinson dancing to "Billie Jean" or Dan Campbell describing how to take someone's last breath by submerging them under water in the ocean abyss.
In an image captured by NFL FIlms, three years are plastered on the back wall of the team meeting room in the Detroit Lions' Allen Park training facility.
• 1992, the last year the Lions won a playoff game.
• 1993, the last season they won a division championship.
• And 1957, the last time they won a league title — 10 years before the Super Bowl.