Adams League vs. Zotti League

Why is there such a vast discrepancy between the leaderboards in the two leagues? The offensive leaders in the Zotti league are far above those in the Adams, while the Adams pitching leaders exceed those in the Zotti league.

I first thought that the overall totals in the Adams League must be pitching biased while the Zotti league is all hitting. It's not. Here are the league totals.

(Warning, big gap ahead in the text for reasons I don't understand)

League	Runs	HR	AVG	OBP	SLG	OPS
Adams	3973	749	.255	.316	.384	.700
Zotti	3889	826	.249	.320	.388	.708

They're essentially almost identical.

However, there's much greater variance in both the team totals and in the individual stats in the Zotti League hitters than in the Adams League. For instance, there's only nine hitters with an OPS over .800 in the Adams League. The Zotti League has nine hitters with an OPS over .860. Similarly, the range in team OPS in the Adams League is less than 100 points, while it's over 170 points in the Zotti League.

The situation is somewhat reversed for pitching. The range in team ERA in the Adams League is 2.41 from low to high, while the range in the Zotti League is only 1.61. The Adams League has five pitchers with an ERA of less than 2.50. The Zotti League leader has an ERA of 2.49 and no one else is below 3.00.

I don't have a compelling explanation. I don't think that the best Zotti League hitters are that much better than the best Adams League hitters, nor do I think that the best Adams League pitchers are that much better than their Zotti counterparts. But, it's something that has intrigued me more and more as the year has gone on. Maybe I'm wrong and the best of the Adams pitchers and Zotti hitters are just vastly superior. In any case, I was wondering if anyone else had an explanation.