Maybe 'needlessly complex' but the way I would want to think about selection would be in terms of 'game credits' Start out with a win being worth one credit and a loss being worth zero. Then each game could accumulate additional credits, win or loss, based on other factors, such as how good the opposing team is, margin, home or road, etcetera - with the caveat that all the credits added to a loss MUST equal less than the value of ANY win. Say, a loss can be made worth up to .75 value. Then divide the total by the number of games the team has played, and rank.