If February is the month when Sports Illustrated is supposed to get a bump from the Swimsuit Issue going onstand online, then March is the month for the recovery of CBS Sports (nee Sportsline) thanks to the NCAA tournament. CBS Sports, which registered mysteriously low numbers during the first two months of the year, rebounded significantly in March, surging back into the Top 10. As an industry insider pointed out to us recently: When will ComScore stop the charade and count CBS Sports and CSTV as one, since they are owned by the same entity? Disclaimer: Nielsen and ComScore are both widely-regarded as the two best ways to track internet hits, but neither is an exact science. If anyone is privy to the Nielsen stats, and would like to send them over, we’d welcome them with open arms. The unique visitor stats for each site after the jump. Also, this summer and we can try to look at the year-over-year stats, which are always fun.

1. ESPN - 22.2 million uniques, up from 17.8 in February. (Regains top spot from Yahoo.)
2. Yahoo - 20.6 million uniques, up from 19.2 in February. (Yahoo is now including Yahoo Mexico Sports and Yahoo India Sports among its roll-ups; only 20 more of those and they’ll catch ESPN.)
3. Fox Sports - 15.9 million uniques, down from 17.4 in February.
4. AOL Sports - 10.9 million uniques, down from 11.6 in February.
5. MLB.com - 9.7 million uniques, up from 6.5 in February.
6. CBS Sports - 8.1 million uniques, up from 3.1 in February.
7. NFL Internet Group - 7.2 million uniques, down from 10.2 in February. (People care about the NFL in March?)
8. NBA Internet Network - 6.1 million uniques, down from 6.4 in February.
9. CSTV - 6.0 million uniques, up from 4.8 in February.
10. Sports Illustrated Sites - 5.2 million uniques, down from 6.3 in February.