Our items the last two days about JA Adande passing on Sports Illustrated to write for ESPN.com led to a flurry of media insiders who felt compelled to correct some of our talk about just which sports websites are dominating the web. (The horse photo may seem silly now - but be patient, grasshopper.)

We usually declare ESPN the most popular sports website, and we like to group the rest of the lot - Sportsline, Fox, Yahoo, Sports Illustrated - as slugging it out for second. What we don’t have access to are Comscore numbers, which offer factual proof as to who really is winning the battle (Comscore is just one way to figure it out; just as bloggers gauge readers based on sitemeter or google analytics). There was a minor uproar in February when ESPN.com slipped to second place behind Fox Sports … after the jump, a tipster passes along May’s eye-popping numbers:

Our tipster writers:

“Any suggestion that the fight behind ESPN is between Fox, Yahoo, Sportsline and SI is a joke. There are three big sites — ESPN, Yahoo and Fox — and then everyone else. It’s not close. Sportsline and SI are nowhere in the mix, just mismanaged brand names with no readers … No newspaper can even begin to compare. Slowly but surely the leagues and teams are beginning to understand this, although the old school hold outs remain.

Here are the May comscore numbers:

Unique Users (000) May 2007

Yahoo! Sports: 15,061
Fox Sports: 14,474
Espn.com: 12,713
* [Update: A few folks with access to comscore note that AOL Sports had 7,100 unique users in May]
Sports Illustrated: 4,945
Sportsline: 3,803

Ok, it’s us again. We’re pretty speechless right now, and surely you’ve got thoughts. So let’s hear ‘em.