Bracketology: Kansas is top national seed, Iowa replaces Virginia as a No. 1

Chaos reigned again in college basketball, creating some significant shuffling in the bracket.

Starting at the top, both Oklahoma ^[2] and Virginia ^[3] lost. The Sooners lost at home to Kansas, giving the Jayhawks a sweep of the regular season series. Kansas assumes the overall No. 1 seed, while Oklahoma falls to No. 2 overall, but still a No. 1 seed.

Iowa ^[4] is back on the top line, replacing Virginia. That could have been Oregon ^[5] , but the Ducks lost again in the Bay Area, this time to Stanford. Oregon moved down instead of up. Here are a few more changes in Sunday's bracket:

Texas A&M ^[6] continued its free fall, this time losing at LSU ^[7]. The Aggies are now pretty squarely in the middle of the bracket, and the middle of the SEC. That is their fifth straight conference loss For the Tigers, the win means getting the last spot in the bracket today.

Another team played its way into the bracket yesterday. Wisconsin ^[8] handed Maryland its first home loss in 27 games, pushing the Badgers into the field and up to a 10-seed. Wisconsin has won seven in a row after a miserable non-conference season.

Alabama ^[9] also picked up a big road win, beating Florida in Gainesville. The Tide have now won five of six.

Duke's ^[10] win over Virginia not only knocked the Cavs off the top line, but it pushed the Blue Devils back comfortably into the upper half of the bracket. They appear to have righted the ship after struggling at the end of January.

Michigan ^[11] picked up a much-needed win at home over Purdue, and the Wolverines own the strangest looking profile in the bracket. They have wins over Maryland, Texas and Purdue, which are three top 25 teams, but those are also their only three top-100 wins. There has been only one team to get an at-large bid with fewer than four top 100 wins since the RPI formula changed in 2005. That was when the committee made the mistake of taking Middle Tennessee State in 2013, which had a gaudy record, but only one top 100 win. The highest seed for a team with only three top 100 wins is a No. 9 seed, which was given to Bucknell in 2006. Even for a team with four top-100 wins, only two teams have been seeded in the top half of the bracket.

It wasn't just a rough day for some of the bigger schools. Wichita State ^[12] had its nation's longest home court winning streak ended by Northern Iowa, which deals a crushing blow to the Shockers' at-large hopes. The Panthers have beaten three teams that were ranked at the time; they also have wins over North Carolina and Iowa State. Yet, they are only 15-11.

Valparaiso ^[13] also lost at home, blowing a six-point lead late to Wright State. The Raiders swept the season series from the Crusaders, although Valpo still has a comfortable lead in the Horizon race. If Valpo fans were harboring any false hopes of an at-large bid, those should now be gone.

Duke fans can point to the fact the Blue Devils are moving up in the bracket after beating Virginia. (USATSI)