You've seen 3-4 and 4-3 defenses. Buddy Ryan made the 46 famous. You've heard of the 5-2, the Wide Nine and the goal-line jumbo. There are endless ways to arrange the 11 men charged with stopping the opposing offense.
On Sunday, the 2017 Pro Bowl might contain the first known instance of the "7-4" defense. At the very least, the NFC squad will have practiced this inverted formation.
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Well, "practice" might be a bit strong of a term. On one rather fun snap during the NFC's Friday morning practice, the front four and the back seven suddenly decided to switch.