Need Help: sports statistics

#1
Hi , I am looking for a formula or an exel formula to rank professional athletes 2016 season statistically. In football, a cornerback has a rating based on how well he performed during the season which is 'Cornerback Rating'. The higher the number the better. I have also summed a value of 'points allowed' by cornerbacks for the 2016 season. The lower number the better. I am looking for a formula that will take into account both values and rank all the cornerbacks for the 2016 season. Any suggestions on a formula? perhaps the inverse average of the two or something? sorry i am new to statistics thanks.