Here you go!

Final MySQL:

SELECT Team, Wins, Losses, CAST(IF(Wins + Losses = 0,0.0,Wins / CAST(Wins + Losses AS Decimal(6,3))) AS Decimal(6,3)) Percentage, ((ABS((SELECT MAX(Wins ) FROM WinLossSum) - Wins )) + (ABS(Losses - (SELECT MIN(Losses) FROM WinLossSum)))) / 2.0 AS GamesBehind

FROM WinLossSum

ORDER BY `Percentage` DESC,`Wins` DESC,`Losses` ASC

Results

TEAM......WINS......LOSSES......PERCENTAGE......GAMESBEHIND

..A............6..............0................1......................0.........

..B............6..............0................1......................0.........

..C............4..............2................0.667................2.........

..D............3..............2................0.6...................2.5.......

..E............3..............3................0.5...................3.........

..F............3..............3................0.5...................3.........

..G............3..............3................0.5...................3.........

..H............1..............5................0.167................5.........

..I.............0..............5................0......................5.5......

..J.............0..............6................0......................6........