It's been a case of teams starting hot and staying hot as we near the one-month point of this major league season. And, it turns out, it doesn't hurt to have a geographic rival to push you as the season gets going.
Both sides of blood-rivalries between the Chicago Cubs and Chicago White Sox, plus the Kansas City Royals and St. Louis Cardinals, are high in these rankings. And while it's hardly a blood rivalry, geographic rivals in the form of the Orioles and Washington Nationals are accounted for, too.
As always, these rankings are completely subjective, yet objectively correct.