It's got be the American League East, right? With the Yankees and Red Sox in that division, it seems like a straight-forward answer.
However, it's not just two teams that make up a division. Let's look at the whole division, from top to bottom. We will do this by adding up the wins and losses of the entire division to calculate each division’s winning percentage.
Of course, if teams only played games in their own division, the winning percentage in every division would be .500. The reality is that more than half of each team's games (56%) are outside of the division (including 10% interleague games).
The All-Star Game week is a good time to ask this question. All the interleague games have been played. Adding in the other interdivision games we now have a total of 62% of all interdivision games completed for the season. We have a good idea which divisions are beating up on the other divisions and which ones are taking a beating.
Here are the 2007 divisional standings without the intradivison games (through games of Thursday, July 12).
| Division | W | L | Pct. |
| AL West | 137 | 118 | .537 |
| AL Central | 154 | 137 | .529 |
| NL West | 139 | 125 | .527 |
| NL East | 129 | 135 | .489 |
| AL East | 145 | 159 | .477 |
| NL Central | 133 | 163 | .449 |
Who would have thought the only American League division below .500 would be the AL East?