A season ago, there was little suspense in the men's NCAA tournament, with Arizona, Duke, Kansas, Michigan State and Gonzaga having clinched spots in the Final Four.

This year, much like the NCAA women's tournament, there are only four guaranteed No. 1 seeds -- Arizona, Duke, Michigan State and Gonzaga. But the men's selections won't be announced for several weeks, leaving a lot of room for conjecture.

The University of Southern California is the Pac-12 Conference champion and the conference's only automatic bid.

Right now, it appears Arizona will be seeded No. 3, Duke No. 4 and Michigan State No. 5.

Michigan and West Virginia tied for the Big 12 regular-season title with 20-3 records and 11-3 conference records. Both have to go through a four-team tournament to determine which one gets the No. 1 seed. The Wolverines have won nine straight.

West Virginia Coach Bob Huggins called the Big 12 tournament "pure chaos." He said the Mountaineers will only beat one team in the tournament if they win it, and they've got to beat Kansas and TCU. Both times, they have lost in the semifinals, which leaves them at 4-6 against teams from the conference.

"We're a quality team that lost," Huggins said. "We would love to beat Kansas and not lose to somebody who doesn't deserve to beat us in the tournament. But that won't happen."

Arizona and Duke have impressive home records, and if they win the conference tournament, the selection committee might reward them with a No. 1 seed.

Here's a look at how other teams are ranked. No. 20 Loyola (Ill.) could get into the field.

Arizona (28-2, 13-2 Pac-12) -- The Wildcats have one more game at home than on the road in the regular season, so they would appear to be in. The No. 2 team from the Pac-12, UCLA, appears locked in.

Duke (28-1, 14-0 ACC) -- The Blue Devils are defending national champions and almost certain to be one of the first four in. They've played very well since losing three of their first five games. No. 3 Purdue (25-2, 13-2 Big Ten) and No. 4 Kansas (25-2, 13-2 Big 12) also have a good chance. If Duke loses, it probably will be the Blue Devils or Purdue.

Michigan State (28-1, 13-1 Big Ten) -- The Spartans will have to get past No. 4 Purdue and No. 8 Michigan in the Big Ten tournament. If they win it, they could get in.

Oregon (25-4, 12-3 Pac-12) -- The Ducks played well at Stanford but had their seven-game winning streak snapped by Arizona. They still have a good chance.

Arizona State (26-2, 12-2 Pac-12) -- The Sun Devils won the Pac-12 Tournament in 2015 and could have a similar run this year. They still could get a bid if they make it out of the Pac-12 tournament.

Oregon State (24-4, 11-3 Pac-12) -- The Beavers are in first place but will have to get past No. 8 Colorado in the Pac-12 tournament. They're not a No. 1 seed pick.

USC (20-7, 10-5 Pac-12) -- The Trojans have a solid chance. They're always in the mix because they have three victories against teams in the NCAA field. They beat No. 2 Arizona and No. 3 Arizona State to get to 10 wins.

Oklahoma State (24-5, 13-2 Big 12) -- The Cowboys, one of three teams seeded higher than No. 6 in the Big 12 tournament, have won eight of their last nine games. They have to get past Iowa State in the Big 12 tournament.

North Carolina (23-6, 10-5 ACC) -- The Tar Heels have a lot of struggles with marquee nonconference games against national championship contenders Kansas and Duke. They've also been knocked off their stride a bit defensively. They need a good Big 12 tournament to get into the tournament.

Notre Dame (23-6, 12-3 Big East) -- The Fighting Irish have won nine straight and are on their way to winning the Big East Conference tournament. If they win it, they should get in.