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The original was posted on /r/cfb by /u/an_actual_lawyer on 2023-10-20 21:25:47.
I cannot for the life of me understand why teams don’t just use a bunch of play calling wristbands to call in plays.
Maybe I’m the idiot. Possible, I have adversarial folks tell me that all the time. Some times they’re right. Let me know.
Step 1: Buy a bunch of wristbands. You’re gonna need 30-40 wristbands in each of 4 colors for the offensive players that will see the field, so 120-160. At $22 per wristband, that is a total outlay of $3,500, although the mfgs will probably provide them for much less.
The bands have 3 sheets each, probably 30 plays per sheet. If that isn’t enough numbers for a game, then double the number and each player wears 2 wristbands.
Step 2: Get some big cards with numbers. These will be used to signal in the plays. Let’s be charitable and say this is gonna cost $1,000.
Step 3: Get 4 play sheets per game for the coaches calling plays. Less than $100.
Step 4, aka how to implement: First, players change bands each quarter and coaches change sheets each quarter. They’re all color coded so you can quickly verify that “everyone has on their white/black/purple/red bands?”
Coaches can organize their play sheets however they prefer, you just assign random numbers to each play. Coach looks at sheet and instead of telling signalers to sign in “Trips left, spider 2 Y banana,” he just looks at the number and says “105.” Signalers put up 105.
Popular plays can be assigned multiple numbers so the defense/opposing coaches can’t say “hey, its 105 again!”
Using a new sheet and bands each quarter means the defense will never have enough time to figure out the calls. The bands essentially function as a one-time-pad which is one of the most secure forms of communication.