How about take the top driver from each zip code, multiply the number of points scored with the zip code and divide that by the population of that zip code. Divide that number by pi and screw a chicken to determine the field. If the chicken lays brown eggs, invert the field. Sorry I don't have a formula for the location yet.
Don't be bringing chickens into this discussion, we are going to have lines of folks supporting the chickens and lines supporting no human/chicken sex.