From traditional statistics such as batting average, to "+" statistics like wRC+ to WAR, you name it and someone has measured it for Major League Baseball.
While I love the numbers and the day-to-day grind of building a statistical profile of a season of baseball, I sometimes wonder if we've overcomplicated the analysis in some respects.
That's why I love the Pythagorean Theorem for Baseball. Give me two easily obtainable numbers, plug them into a formula and you have your answer, in this case, what a team's winning percentage should be.