Who invented the nickel defense?

Who invented the nickel defense? The nickel defense was popularized by head coach Don Shula and defensive coordinator Bill Arnsparger of the Miami Dolphins in the 1970s and is now commonly employed in obvious passing situations or against a team that frequently uses three+ wide receiver sets on offense.

The nickel defense was popularized by head coach Don Shula and defensive coordinator Bill Arnsparger of the Miami Dolphins in the 1970s and is now commonly employed in obvious passing situations or against a team that frequently uses three+ wide receiver sets on offense.