Use your favorite cake mix and bake as directed on the package baking in a rectangle pan.
To make the grass tint coconut green (click here for how to tint coconut)
Use white frosting to mark the lines and numbers on the football field.
Frost the ends of the field with your teams color and pipe their name on it.
Make the goal posts out of straws using small blobs of icing to stick them together. Use liquorice tubes to sand the goal posts in.
Add football figures (optional)
or top with a large football made from 2 loaf cakes