I would only use screens if the teams were 1 through say 15 or 20 for each team. You can fit 2 eight inch numbers on each side of a 20x24 screen so 12 screens would go up to the number 24. Follow?

If they want to order all random numbers for each player then I would use a vinyl transfer for those because you can’t make screens for individual numbers that are unique. That would be way too much work.