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Dimers NCAAB Model Results: The Best Spots to Attack Heading Into March Madness 2026
Updated: | First published:
Written by Jason Bevilacqua, Head of Content and Communities
Reviewed by Nick Slade
With Selection Sunday approaching, we break down where the Dimers college basketball model has found its sharpest edges this season, and what that means for your March Madness betting strategy.
As Champ Week winds down for the 2025/26 college basketball regular season, and the bracket picture comes into focus, bettors are shifting their attention to one of the biggest betting events on the calendar. Before diving into March Madness predictions, it's worth understanding where the Dimers NCAAB model has been at its sharpest all season long, because the data tells a clear story.
After thousands of tracked bets from the Dimers college basketball model across opening and closing lines, a few key patterns have emerged that should shape how you approach your tournament card.
Spread Favorites on the Closing Line Are the Model's Strongest Market
The headline number from a full season of model tracking: closing line spread favorites have returned a +6.32% ROI across 510 bets. That's not a small sample fluke - it represents a consistent, season-long signal that the Dimers model has been particularly effective at identifying value on favored teams against the spread when assessed at closing line prices.
For March Madness, where oddsmakers are setting lines on teams they may have less data on than the major conferences, this is an important edge to keep in mind. When the model likes a favorite on the spread heading into tip-off, the season-long track record says that's worth paying attention to.
Check the latest college basketball best bets to see which spread favorites the model is targeting as the tournament approaches.
Opening Line Spreads: The 2-3% Edge Range Is Outperforming
On the opening line side, the model's 2-3% spread edge range has posted a +5.22% ROI across 353 bets; the best-performing edge threshold of the season in terms of reliability and sample size. That means when the model identifies a smaller, more surgical edge against the opening number, it's historically been more accurate than when it swings for larger discrepancies.
This matters for March Madness bettors who like to get down early in the week when lines first open. Cross-referencing the model's opening line picks against that 2-3% edge window has been the sharpest approach all season.
Browse the full CBB predictions schedule to track opening lines as tournament matchups are confirmed.
When the Model Finds a Big Edge on the Moneyline, It's Delivered
Head-to-head moneyline results on the opening line at the 10%+ edge range have returned +29.30% ROI. And while the sample is intentionally small (the model rarely flags edges that large), it underscores a key principle: when the Dimers model identifies a significant gap between its projected probability and the implied sportsbook odds on the moneyline, those spots have historically been the most profitable of all.
In a tournament full of potential upsets and mispriced lines on mid-major programs, keep an eye on any moneyline pick where the model is showing a double-digit edge. Those are the spots worth prioritizing.
Totals: Opening Line 5-10% Edge Range Posts Positive ROI
For over/under bettors, the model's opening line results in the 5-10% edge range have returned +4.70% ROI across 133 bets this season.
Totals are a notoriously difficult market to beat, so a positive ROI at a meaningful edge threshold is worth flagging, particularly for betting before sharp money moves the number.
Pair totals picks with the model's college basketball player projections to get a deeper read on scoring output before committing to an over or under.
The Bottom Line for March Madness Bettors
The Dimers NCAAB model's season-long data points to a clear hierarchy of where the edges are real:
✅ Closing line spread favorites (+6.32% ROI) - the model's strongest market overall
✅ Opening line spreads in the 0-3% edge range (+5.22% ROI) - best for early-week bettors
✅ Moneyline spots with 10%+ model edge (+29.30% ROI) - rare but historically the sharpest
✅ Opening line totals in the 5-10% edge range (+4.70% ROI) - a value spot for O/U bettors
As brackets are set and lines hit the board, filter your March Madness card through these thresholds. The model has done the work across a full season - the data now tells you exactly where to focus.
For the latest college basketball best props and daily picks as the tournament tips off, stay locked to Dimers.
To give you the most accurate and helpful information, this article has been reviewed and edited by Nick Slade through our fact-checking process.
Jason Bevilacqua, an expert in MLB, NHL, NBA, MLS, and NFL, delivers game previews, best bets, and props. Since 2020, as Head of Social and Community at Dimers, he has contributed insightful articles utilizing data-driven models and simulations.
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