Lead
The NCAA will unveil the 68-team tournament field at 6 p.m. ET on CBS as part of the March Madness Selection show, naming 31 automatic qualifiers and 37 at-large teams. On3’s latest bracketology compiles available data and conference tournament outcomes into a projected bracket updated through 11:45 a.m. ET on 3/15. Projections include the First Four matchups, regional placements and a projected 1-seed line led by Duke, Michigan, Arizona and Florida. As a final wave of conference results trickles in, this projection will be updated up to and after the Selection show.
Key Takeaways
- The field will consist of 68 teams: 31 automatic bids and 37 at-large selections, announced at 6 p.m. ET on CBS.
- Projected No. 1 seeds (overall 1-line): Duke, Michigan, Arizona and Florida, with Duke holding the projected No. 1 overall slot after the ACC Tournament win.
- Projected 2-seeds include Purdue, Houston, Iowa State and UConn; Purdue is likely to land a 2-seed after a deep Big Ten run.
- First Four (Dayton) projection: 16-seed Idaho vs. 16-seed Howard; 16 Lehigh vs. 16 Prairie View; 11 Miami (OH) vs. 11 Missouri; 11 SMU vs. 11 Texas.
- Projected “last four byes” (teams on the 11/12 borderline): Santa Clara, NC State, St. Louis and UCF; last four in: Miami (OH), Missouri, SMU and Texas.
- Notable regional starts and host sites: Greenville, Buffalo, San Diego, Tampa and Philadelphia appear across regional maps in current projections.
- UConn’s loss in the Big East final and Florida’s SEC semifinal defeat affected upward mobility among top seeds; Arizona’s Big 12 title solidified its top regional placement.
Background
The NCAA Selection Committee constructs the 68-team bracket each March using a combination of objective measures and committee judgment. The NET Rankings—an algorithm that categorizes wins and losses into four quadrants—serves as a primary analytic tool, though quadrant placement, quality wins, road results and conference tournament performance all inform seeding decisions. Bracketology is the practice of forecasting how the committee will seed teams given those inputs; it weighs NET, resume quality and late-season results to approximate the committee’s view.
Conference tournaments often reshape the bubble and the seeding landscape in the final days before Selection Sunday, as automatic qualifiers replace potential at-large teams and marquee wins can vault a program up the seed line. Selection considerations also include geography and institutional preferences for site placement, which can affect where a seeded team starts the tournament. Because the committee retains discretion, bracketologists supply a probabilistic bracket rather than a certainty—hence the live updates through the selection show.
Main Event
The projected bracket lists Duke, Michigan, Arizona and Florida as the 1-seed quartet, with Duke holding the projected top overall seed following its ACC Tournament victory. Duke is slated to begin its regional slate in Greenville before advancing toward a potential Washington, D.C. second-week site. Michigan projects as a 1-seed in the Buffalo region and is expected to travel to the Midwest region for the second weekend, with Arizona occupying the San Diego-based West region after winning the Big 12.
Purdue is positioned as a 2-seed after its Big Ten run and would likely play first-weekend games in St. Louis under current projections. Houston, despite a Big 12 title-game loss to Arizona, projects as a 2-seed in the South region, while Iowa State sits as a 2-seed in the Midwest projections following a strong Big 12 tournament showing. UConn’s Big East final loss means the Huskies may remain a 2-seed or slip slightly depending on how the committee balances recent results—and site preferences could place them in Philadelphia to start.
The First Four in Dayton reflects the bracket’s borderline matchups: two 16-v-16 games (Idaho vs. Howard and Lehigh vs. Prairie View) and two 11-v-11 play-ins (Miami (OH) vs. Missouri and SMU vs. Texas). The First Four winners would immediately move into the main 64-team bracket, with those games often producing high-variance outcomes that affect early-round matchups. Several mid-major automatic qualifiers are projected in 12–14 seed ranges, potentially setting up classic upset targets for higher seeds.
Across regions, projected matchups include traditional power-versus-mid-major pairings and several intriguing 4/13 and 5/12 tilt possibilities—Kansas vs. Akron, Gonzaga vs. Cal Baptist and Texas Tech vs. Yale among them. The bracket makes travel and rematch dynamics salient: some teams face early rematches of conference foes while others would travel long distances for opening weekend, a factor the committee often considers when finalizing site assignments.
Analysis & Implications
For bubble teams, the window between now and Selection Sunday is binary: one more upset in a conference final or a late loss can swing a team from safety to the outside. The projected last four in (Miami (OH), Missouri, SMU, Texas) and first four out (Auburn, Oklahoma, SDSU, Indiana) highlight how narrow the margins are—resume detail such as quadrant wins and road success will be decisive. Teams on the cusp should be evaluated not only by NET placement but by how many quadrant-one wins they can present to the committee.
At the top, the presence of Duke, Michigan and Arizona as projected 1-seeds stabilizes the bracket’s upper tier and affects balance: when multiple blue-blood programs occupy the 1-line, other high seeds (2–4) are distributed to preserve overall bracket fairness. That has downstream implications for potential Final Four paths, as a No. 2 or No. 3 seed might face markedly different opponents depending on how the committee spreads power-conference teams across regions. Seeding nuances—such as whether UConn lands a 2-seed or slips—could alter which region appears most stacked.
From an institutional perspective, host sites and preferred-region requests can subtly influence openings. While the committee says preferences do not trump seed integrity, placement decisions aim to minimize travel and respect bracket integrity, producing frequent debates when teams with similar seeds are assigned to different regions. For fans and athletic departments, selection geography impacts travel budgets and attendance forecasts for the first weekend.
Comparison & Data
| Projected 1-line | Projected 2-seeds |
|---|---|
| Duke, Michigan, Arizona, Florida | Purdue, Houston, Iowa State, UConn |
The table above summarizes the projected top seeds and the likely 2-seeds based on NET and conference-tournament outcomes through 11:45 a.m. ET on 3/15. Additional key lists include the First Four play-in pairings and the last four in/byes; those distinctions are often decided by minute resume differences and committee judgment. Historically, teams in the last four in have a nontrivial chance of advancing in the tournament—matchup quality, not just seed number, governs upset probability. Expect these lists to shift if any late conference outcomes differ from current results.
Reactions & Quotes
Bracketologists and analysts emphasize the narrow margins separating bubble teams and the heightened value of late-season quality wins. Those assessments frame why a handful of conference results can reconfigure multiple seed lines.
“With so many resumes clustered in the same NET band, quadrant wins and recent road victories will likely determine the last at-large spots,”
On3 Bracketology Analyst
This comment underscores the central role of quadrant victories in committee deliberations and explains why some teams with similar records sit on opposite sides of the bubble. Analysts expect the committee to parse head-to-heads, common opponents and injury information in close cases.
“Selection Sunday is less about one statistic and more about the totality of a team’s résumé, including how they finished the season,”
College Basketball Data Analyst
That framing points to the committee’s holistic approach and suggests why late-season momentum matters for seeding. It also explains why teams that peaked in conference tournaments can improve their standing even if their NET number is comparable to other squads.
“First Four matchups often set the tone for potential Cinderella runs—those Dayton games are high-leverage for bubble schools,”
Midwest Region Scout
The Dayton play-ins produce immediate implications for bracket dynamics; winners can gain rhythm and momentum that translate into upset performance in the main draw. Scouting departments pay close attention to those matchups for that reason.
Unconfirmed
- Exact seed assignments can still change if there are late scoreboard shifts in conference championship games happening after the last update at 11:45 a.m. ET on 3/15.
- Preferred-region requests and final site assignments reported by institutions have not been fully released and may affect some team placements.
- The committee’s internal tiebreakers and judgment calls on resumes (injuries, availability, head-to-head context) remain private and could alter a few borderline selections.
Bottom Line
On3’s projection presents a working bracket ahead of the official Selection Sunday reveal at 6 p.m. ET on CBS, reflecting conference tournament outcomes and NET-driven resume evaluation through the latest update. The 68-team field will include 31 automatic qualifiers and 37 at-large teams, and several bubble spots remain tightly contested; expect last-minute movement for teams listed among the last four in or first four out. Fans and programs should treat this bracket as a near-term forecast—final committee placement may differ as the Selection show consolidates all remaining information.
Keep an eye on the First Four pairings in Dayton and the top-line seeds headed to Greenville, Buffalo, San Diego and other host sites, since those assignments shape potential travel and matchup narratives for the opening weekends. On3 will provide live bracket updates leading into and following the Selection show so readers can track confirmed seeds and evolving matchups in real time.
Sources
- On3 — bracketology preview and projections (media/analysis)
- NCAA — March Madness selection show info (official NCAA announcement & event page)
- NCAA — NET Rankings explanation (official methodology)