Conference tournament week during the college basketball season can be a prelude to madness.

The potential mayhem from league tournaments allows lower-seeded teams knocking off regular-season champs to clinch a berth to the Big Dance. And for one-bid leagues, that can be a brutal end to standout season.

March Madness bracket live updates: Miami Ohio loss shakes up NCAA Tournament field

So far this March, No. 1 seeds have had a rough time.

Through play on midday Thursday, March 12, we have already seen 11 No. 1 seeds go down, including the previously undefeated Miami (Ohio) in the MAC tournament quarterfinals.

According to ESPN, 51 of the 63 conference tournaments in 2023 and 2025 were won by Nos. 1 or 2 seeds. Could this year be different?

Here's a look at the No. 1 seeds that have been toppled in conference tournaments so far:

As of 2 p.m., Thursday, March 12, 11 No. 1 seeds have been knocked out of their respective conference tournaments.

The number can grow, with a handful of No. 1 seeds in some of the major conferences playing in their first conference tournament games over the next couple of days.

• SWAC: Bethune-Cookman (quarterfinals)
• Patriot: Navy (semifinals)
• MAAC: Merrimack (championship game)
• Conference USA: Liberty (quarterfinals)
• MAC: Miami Ohio (quarterfinals)
• MVC: Belmont (quarterfinals)
• Big Sky: Portland State (quarterfinals)
• ASUN: Central Arkansas (championship game)
• SoCon: East Tennessee State (championship game)
• CAA: UNC Wilmington (quarterfinals)
• Southland: Stephen F. Austin (championship game)

This article originally appeared on USA TODAY: College basketball No. 1 seeds keep losing in conference tournaments