He’s been expanding his collection of game-used Nebraska football jerseys for three years. He has six so far. A friend of his, he says, has more than 100, bought from former players and in stores.

Some fans (like me) love the timeless simplicity of what Nebraska wears. The white helmet with the red, sans serif N. Red jerseys with white pants at home. White over red on the road.

A coach can do more than tell his QB which play to run. Helmet comms can also be used for bigger-picture reminders of time, down and situation and when it’s time to take a risk or play it safe.

The head of GSC, a well-known company in football circles based in little-known Wahoo, Nebraska, had been supplying coach-to-player helmet communications to the NFL for the last decade. This was ...