If you like trends, how’s this: In January, according to comScore, ESPN was the most heavily-trafficked sports website, followed by Yahoo. In February, it was Yahoo, followed by ESPN. In March, ESPN was tops, and Yahoo was second. Anyone want to take a guess what happened in April? Yup - Yahoo first, and ESPN second. No major developments in April - according to comScore, Fox is still third, AOL is slowly gaining eyeballs, and CBS Sports, which seemed to have figured out the early-year numbers mishap, dipped down again. For the first time (finally!) somebody sent us Nielsen numbers. We’ve included those after the comScore number, and they are slightly different from what comScore reports. The breakdown after the jump.

1. Yahoo - 21,613,000 unique visitors; 19,207,000 uniques
2. ESPN - 21,423,000 unique visitors; 19,114,000 uniques
We heard an interesting story recently about Jayski, one of ESPN’s roll-ups. Apparently, the site was purchased a little while back - for a staggering 7-figure number you are unlikely to believe. Jayski registered 303,000 uniques in April. Expect this trend to accelerate as advertising on the internet increases.
3. Fox Sports - 14,692,000 unique visitors; 12,456,000 uniques
4. MLB.com - 13,318,000 unique visitors; 12,483,000 uniques
5. AOL Sports - 12,080,000 unique visitors; 9,964,000 uniques
6. NFL Internet Group - 8,069,000 unique visitors; 7,149,000 uniques
7. NBA Internet Network - 6,827,000 unique visitors; 3,289,000 uniques
8. Sports Illustrated Sites - 5,140,000 uniques visitors; 8,252,000 uniques
9. WWE - 4,700,000 - unique visitors; 2,794,000 uniques
10. CSTV - 4,490,000 - unique visitors; 10,046,000 uniques (combined with CBS Sports)

* Of note, I - CBS Sports was 11th at 4,455,000 unique visitors in comScore, but that’s not really accurate. CBS Sports long-ago bought CSTV, so the two should be rolled into one, but for whatever reason, comScore doesn’t do that. Nielsen did, and that number is reflected above.

* Of note II - as the debate still rages about what blogs are and aren’t mainstream, we’re going to continue to leave them off the list. It’s not like they’d rank near the top or anything - but a small number of blogs are slowly creeping up the charts. While five placed in the Top 130 (Deadspin, TBL, MLB Trade Rumors, Pro Football Talk and With Leather; excluding network sites like Ballhype and Fan IQ), there really is no telling how many others could be in the mix because we have no idea who is registered with comScore and who isn’t.