March Madness upsets are sure to come. Some teams to be wary of as you fill out your bracket

FILE - Fairleigh Dickinson guard Grant Singleton (4) celebrates after a basket against Purdue in the second half of a first-round college basketball game in the men's NCAA Tournament in Columbus, Ohio, Friday, March 17, 2023. Purdue was a 23 1/2-point favorite when it went out in the first round to No. 16 seed Fairleigh Dickinson last year. (AP Photo/Michael Conroy, File)

FILE - Fairleigh Dickinson guard Grant Singleton (4) celebrates after a basket against Purdue in the second half of a first-round college basketball game in the men’s NCAA Tournament in Columbus, Ohio, Friday, March 17, 2023. Purdue was a 23 1/2-point favorite when it went out in the first round to No. 16 seed Fairleigh Dickinson last year. (AP Photo/Michael Conroy, File)

March Madness wouldn’t be March Madness without the excitement of those early upsets in the NCAA Tournament.

The 68-team field won’t be announced until Sunday, but it’s a safe bet that one or more high seeds will get bounced early.

March Madness 2024

Purdue was a 23 1/2-point favorite when it went out in the first round to No. 16 seed Fairleigh Dickinson last year — another in a line of tournament clunkers for the Boilermakers. Maybe it was because Purdue’s guards couldn’t make shots. Maybe Fairleigh Dickinson’s small lineup bothered the Boilermakers.

Kihei Clark’s memorably bad pass set up JP Pegues’ winning 3-pointer in No. 13 Furman’s upset of No. 4 Virginia last year, but the matchup did the Cavaliers no favors. Furman plays at a high tempo and spreads the floor. Virginia goes slow and its defense had difficulty guarding the perimeter, allowing Furman to stay in the game.

“The style makes the fight in how some of these things can happen if your strength combats the other team’s weakness and the other team is one of those higher seeds. That’s where you run into trouble,” said Field of 68 analyst and TV commentator Terrence Oglesby.

The odds of various teams winning the national title are fun to consider — as of Friday, injury-riddled blueblood Kansas is a 30-1 long shot, according to FanDuel Sportsbook, while San Diego State is 75-1 a year after crashing the national title game. Different season, different team.

Here are some projected high seeds that could be on upset alert the first weekend of the tournament:

ALABAMA

A sad Alabama bench contemplates the pending loss during the second half of an NCAA college basketball game against Florida Tuesday, March 5, 2024, in Gainesville, Fla. (AP Photo/Alan Youngblood)

A sad Alabama bench contemplates the pending loss during the second half of an NCAA college basketball game against Florida Tuesday, March 5, 2024, in Gainesville, Fla. (AP Photo/Alan Youngblood)

The Crimson Tide can win a scoring contest against anybody. The question is whether they can play enough defense to win a game if the pace becomes grinding, as often happens in the tournament. Mark Sears is one of the best guards in the country, and he leads the nation’s most efficient and highest-scoring offense. But they are 342nd out of 351 teams in scoring defense.

DUKE

Duke head coach Jon Scheyer reacts after a foul during the second half of an NCAA college basketball game against North Carolina in Durham, N.C., Saturday, March. 9, 2024. (AP Photo/Ben McKeown)

Duke head coach Jon Scheyer reacts after a foul during the second half of an NCAA college basketball game against North Carolina in Durham, N.C., Saturday, March. 9, 2024. (AP Photo/Ben McKeown)

First, the Blue Devils are among the teams fully capable of reaching the Final Four. They went into the ACC Tournament 8-2 in their last 10 games, and most of those wins weren’t close. Still, Duke was ousted in the ACC quarterfinals by North Carolina State. There’s been a drop in rim protection since Derek Lively II left after last season. There’s also been a late-season injury to freshman guard Caleb Foster — a part-time starter — that has left him wearing a protective boot on his right foot. A team with quick guards who can get to the basket could be trouble.

IOWA STATE

Iowa State guard Curtis Jones (5) shoots over Kansas State guard Tylor Perry (2) during the first half of an NCAA college basketball game Saturday, March 9, 2024, in Manhattan, Kan. (AP Photo/Charlie Riedel)

Iowa State guard Curtis Jones (5) shoots over Kansas State guard Tylor Perry (2) during the first half of an NCAA college basketball game Saturday, March 9, 2024, in Manhattan, Kan. (AP Photo/Charlie Riedel)

The Cyclones have been fabulous defensively in three seasons under T.J. Otzelberger, and they beat Houston, Kansas and BYU while going 18-0 at Hilton Coliseum this season. Thing is, almost half of those home wins came against weak nonconference opponents that inflated their NET ranking. The concern is if the Cyclones get a matchup against a team that takes care of the ball and has a big, physical guard.

KANSAS

Kansas's Hunter Dickinson, right, is helped after being injured during the second half of an NCAA college basketball game against Houston Saturday, March 9, 2024, in Houston. Houston won 76-46. (AP Photo/David J. Phillip)

Kansas’s Hunter Dickinson, right, is helped after being injured during the second half of an NCAA college basketball game against Houston Saturday, March 9, 2024, in Houston. Houston won 76-46. (AP Photo/David J. Phillip)

Big 12 scoring leader Kevin McCullar, big man Hunter Dickinson and freshman Johnny Furphy headline a strong starting five. But McCullar tweaked a bone bruise in his knee and Dickinson dislocated a shoulder, and both missed the Big 12 Tournament. That put a lot of pressure on a bench woefully short of depth and it showed in a 20-point loss to Cincinnati in the Big 12 tourney opener. The Jayhawks’ eight losses in conference play are their most since 1988-89, and a program that won it all just two seasons ago went 3-7 on the road. Silver lining: The Jayhawks get a full week to rest before their NCAA opener.

MARQUETTE

FILE - Marquette's Tyler Kolek shoots over Creighton's Ryan Kalkbrenner during the first half of an NCAA college basketball game Saturday, Dec. 30, 2023, in Milwaukee. Kolek was selected to the AP All-Big East first team in balloting released Tuesday, March 12, 2024. (AP Photo/Morry Gash, File)

Marquette’s Tyler Kolek shoots over Creighton’s Ryan Kalkbrenner during the first half of an NCAA college basketball game Saturday, Dec. 30, 2023, in Milwaukee. Kolek was selected to the AP All-Big East first team in balloting released Tuesday, March 12, 2024. (AP Photo/Morry Gash, File)

Marquette is another example of how a late-season injury to a key player could be ruinous. Tyler Kolek has missed the four three games with a strained oblique and was ruled out of the Big East Tournament opener Thursday, an OT win. Coach Shaka Smart said Kolek will be available for the NCAA Tournament, but will he be 100%? The Golden Eagles are potentially great when he is fully healthy. They aren’t nearly the same otherwise. The best point guard in America is capable of scoring 30 points with double-digit assists any given night.

PURDUE

FILE - Fairleigh Dickinson guard Grant Singleton (4) celebrates after a basket against Purdue in the second half of a first-round college basketball game in the men's NCAA Tournament in Columbus, Ohio, Friday, March 17, 2023. Purdue was a 23 1/2-point favorite when it went out in the first round to No. 16 seed Fairleigh Dickinson last year. (AP Photo/Michael Conroy, File)

Fairleigh Dickinson guard Grant Singleton (4) celebrates after a basket against Purdue in the second half of a first-round college basketball game in the men’s NCAA Tournament in Columbus, Ohio, Friday, March 17, 2023. (AP Photo/Michael Conroy, File)

The Boilermakers seem likely to land another No. 1 seed and are on the list only because of their recent history: a first-round loss to No. 16 seed Fairleigh Dickinson in 2023, a Sweet 16 loss to No. 15 Saint Peter’s in ‘22 and a first-round loss to No. 13 North Texas in ’21. They have been upset by a lower seed in six of their last 10 NCAA appearances. Still, this team is better than a year ago with Zach Edey again leading the way. Maybe this is the year Matt Painter makes it to his first Final Four.

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AP March Madness coverage: https://apnews.com/hub/march-madness

Olson is an Associated Press sports writer based in Omaha, Nebraska. He covers Nebraska, Creighton, the Big Ten and national college sports issues.