Let's look at the data. We are 12-12 and have outscored our opponents 91-87. So our record is what it should be. We are 13/15 in runs and 2/15 in ERA. So we score 3.81 runs per game. League average: 4.43.
So we are only 86% of the league average. Suppose we were at that level instead. That would be .62 runs per which is 15 runs more. That puts us at 106 runs instead of 91. Running a league-average run total through the expected win/loss formula (Pythagorean) results in an expected final record of
91-71.
http://replacementlevel.com/stuff/sg/Calculators.html