The Philadelphia Phillies might have a great record, the New York Yankees are the best by far. But sometimes, a team's record is not the best indication of how well they have played. And if a team has been a little lucky early in the year, the standings may show a market correction moving forward.

To get a sense of which teams have played the best do far, we can use run differential, or the difference between the number of runs scored and the number of runs given up.

We can even use those numbers to calculate a record that is more reflective of how well that team played, using a formula called Pythagorean Win Percentage. In the chart below, every team is ranked by their Pythagorean (expected) Win Percentage.