I have been told that more runs are scored in the seventh inning of baseball games than any other inning.
The reason would be the "changeover." If the starter is still pitching the seventh inning, it's probably his last, he's tired, and will probably give up more runs than in other innings. If a reliever is on the mound, he's probably not one of the two best (these pitch the eighth and ninth).
Is this in fact true?