No. 1 seeds almost always win their first-round games in March Madness. Historically, they dominate the tournament’s opening weekend and rarely lose to the lowest-seeded teams. But bettors who regularly bet on March Madness understand something important: winning the game and covering the spread are two completely different things.
Sportsbooks enter large point spreads for top seeds in the NCAA Tournament every year. These 20-point + lines indicate not only the talent gap between two teams, but also the betting influx. Casual bettors tend to back favorites, specifically horseshoe brand teams at the top of the bracket.
However, the data tells a different story. No. 1 seeds in the NCAA Tournament have a spread covering record that is close to break-even. Meaning, the market prices in their dominance, and sometimes even exaggerates their dominance.
This creates different opportunities on the board. Underdogs can stay within massive spreads, middle seeds can go on expected runs, and the nature of a single-elimination tournament can wreak havoc on the board.
Top seeds are overpriced, and this has created value for the rest of the field. The value is often overlooked because of the tournament structure, the betting public, and the top seed’s historical performance.
When Dominant Teams Fail to Beat the Spread
Dominance Doesn’t Always Equal Betting Value
No. 1 seeds have the most wins in the history of the NCAA Tournament. In history, the most one-sided matchup in sports gambling is how No. 1 and 16 seeds have played one another. However, the betting market will not award a gambler a winning bet for an obvious prediction. This is because for books, the favorites winning are almost a given as they are expected to win.
For No. 1 seeds, they have historically been slightly above and slightly below one-half winning the spread, meaning they have historically ended around the same mark. This is closely similar to the spread books set to make sure they profit regardless of the outcome. No. 1 seeds do face spread prediction accurately; however, it’s an extremely close margin, almost too close.
To win by covering a spread, the No. 1 seed must win by at least the betting favorite’s amount. A No. 1 seed winning by a large margin, such as 17 or 18 points, would still be a loss for everyone betting on the No. 1 seed. This is a common occurrence in the early rounds of the tournament.
In the final minutes of a game, top teams will rotate players, slow the game down, or keep the No. 1 seed lead they have just gained. This will win the game, but can allow the underdog teams to stay close within large spreads. That is, for betting purposes, the gap between winning the game and covering the spread becomes an area with value.
Public Betting Pushes Favorite Odds Higher
One of the largest betting audiences in sports is associated with March Madness. It is the only time of year that many fans across the country will place bets on the outcome of college basketball games.
With respect to public betting, the following trends are quite common.
- Wagering on No. 1-seeded teams.
- Wagering on teams that are nationally ranked
- Wagering on teams from the power five conferences
- Wagering on teams that had a good regular season record.
Bookmakers know these trends well. When betting favorites get a lot of public betting action, the bookmakers move the line. Bookmakers put the line higher to protect their balance, then adjust the lines up to entice betting on the underdog team.
This usually causes the point spread to be higher than a statistical model would predict. For example, a model would predict that the top seed would be favored by 18 points, but sportsbooks will move the line to the betting public 20 to 21 points.
This extra margin is key. High spreads will more often than not provide for underdogs to cover the spread even if they lose by a large margin. It is for this reason that a common occurrence is that the favorites lose.
The Tournament Always Produces Surprises
Every tournament for March Madness has unpredictable outcomes.
For almost every tournament since 1985, at least one double-digit seed has made it to the Sweet 16. Several tournaments even create total bracket upheavals because of the number of Cinderella stories they have.
One of the most recent tournaments made history because it had a Final Four with no No. 1, No. 2, or No. 3 seeded teams at all.
These types of results show us how unpredictable single-elimination basketball really is.
One shooting night, a player’s foul trouble, or a matchup with a particular player disadvantage could all result in a game being lost. If a team is underseeded, the chances for the team to win increase with every passing game, just because of how unpredictable the game is.
Cinderella teams frequently share several characteristics:
- Skilled line-ups
- Effective shooting from beyond the arc
- Robust defensive structures
- Shallow game tempo with a minimal margin on overall points
These characteristics enable the underdog teams to manage tempo and limit scoring runs against the higher-seeded teams
Promotions also play a role in betting strategies during the tournament. Many sportsbooks release March Madness betting promos that boost odds or provide insurance on wagers. When combined with smart underdog selections, these promotions can enhance long-term betting value.
The unpredictable nature of the tournament presents opportunities for methodical bettors.
How Smart Bettors Look for Value
Successful bettors for March Madness take a different approach than your average fan.
Instead of looking linearly at which team is “better,” they determine whether the betting line is a good reflection of the matchup.
There is value created consistently in several scenarios:
Large Early-Round Spreads
When spreads reach over 20 points, the favorites simply cannot afford to lose focus on achieving the spread. Even the best teams have trouble maintaining focus when the game is in hand for 40 mins.
Mid-Tier Seeds with Strong Metrics
Between the 6-11 range in the bracket, there are a lot of teams with good metrics, despite being seeded low. These teams are capable of outperforming expectations and are likely to make the second weekend.
Undervalued Mid-Major Programs
Small conference champions are often overlooked when it comes to seeding. They enter with good chemistry and momentum.
Matchups Favoring Pace Control
Underdogs who play a slower style make it more difficult for the favorites to meaningfully distance themselves.
Smart bettors understand the importance of matchups, tempo, and situation when evaluating the tournaments
Knowing these elements creates an edge over the average bettor who lacks the understanding of these components.
Expert Insights: Smart Strategies for Betting Around Top Seeds
Do Not Blindly Bet On Favorites
Most bettors think betting on favorites is automatic value. History shows betting favorites is nearly breakeven on the spread in the NCAA Tournament. Instead of just blindly betting the higher seed, look to see if the point spread is reasonable for the matchup.
Watch For Early Movement
Opening spreads are adjusted based on public betting. The more public bets placed on a team, the more the sportsbook shifts spreads to favor that team. Early betting can set a more favorable spread.
Bet On Big Underdogs
Underdogs that are given a 15-point spread typically stay competitive due to the defense they play or a slow/smart pace. They can still lose the game, as long as they stay within the spread range, they will cover.
Look At The Numbers
Using Efficiency ratings is a better way to gauge how teams will perform than seeding. Defensive efficiency or balanced offense explains games that are expected to be close.
Bet Against The Crowd
When there is a lot of public betting on one team, the sportsbook will favor the spread in their direction. Underestimating the public betting on the favorite opens the door to betting value on the underdog.
Think About Live Betting Options
During March Madness, the momentum of the games can shift rapidly. If a favorite in the matchup is behind in scoring, live betting will most likely be able to offer you better spreads than the betting lines before the game started.
Frequently Asked Questions
Q: Why does the betting market exaggerate the prices of No. 1 seeds?
A: No. 1 seeds getting the most public bets causes sportsbooks to widen the margin, which makes it much more difficult for No. 1 seeds to cover the spread even when they win by a large margin.
Q: Do No. 1 seeds still win the majority of tournament games?
A: They win the majority of games during the tournament, but they win by lower margins, which causes them not to cover the spread.
Q: How many upsets happen in March Madness?
A: Every year, there are many upsets, often resulting in multiple double-digit seeds moving on to the next round and even the Sweet 16.
Q: Are there ways to make money by betting during March Madness on the underdog teams?
A: Yes, betting on underdogs can be profitable, especially when the underdog team has a large spread in comparison to the favorite team. Even when they do lose the game, the underdogs usually stay within the spread range.
Q: When is the best time to place bets on the tournament?
A: When bets are placed at the beginning of the tournament, it leads to better odds, but at the end of the tournament, odds may become even larger due to public betting being more in favor of the higher-seeded teams.
Q: How effective are advanced stats in betting during March Madness?
A: Advanced stats like offensive and defensive efficiency and pace are useful for finding teams with lower seeding than they should have and are therefore likely to perform better than expected.
Q: What do you think is the biggest mistake bettors make during the tournament?
A: Not assessing whether the betting spread actually has value and instead betting based on name or ranking.
Q: How Public Betting Percentages Influence Odds on March Madness Betting Sites?
A: When most bets are on a favorite, March Madness betting sites may raise the spread to balance action, creating potential value on the underdog.
The Real Edge in Tournament Betting
March Madness rewards bettors who think beyond the obvious.
Top seeds will continue to win the majority of their games, but that success does not automatically translate into betting value. The numbers consistently show that No. 1 seeds cover the spread only about half the time.
That reality creates opportunity.
Three lessons stand out:
- Large spreads make it difficult for favorites to deliver betting value.
- Underdogs often stay competitive deep into games.
- Mid-tier seeds regularly outperform expectations in the tournament.
For bettors planning to bet on March Madness, success depends on identifying mispriced lines rather than simply predicting winners.
Smart bettors evaluate matchups, monitor line movement, and recognize when public betting inflates odds.
Those insights can turn tournament chaos into opportunity.
To access competitive odds, updated tournament markets, and exclusive promotions, visit BetNow and explore the board before the next tip-off.
Hilbert Mayer
Sports Writer
Hilbert Mayer is a professional sports writer, betting analyst, and content strategist with over 15 years of experience in the sports industry. Before focusing on sports betting analysis and handicapping, Hilbert worked as a sports writer for various news outlets, covering everything from game recaps to in-depth matchup features. Today, he specializes in MLB, NFL, March Madness, and UFC betting, combining his journalistic background with deep statistical expertise and real-world betting insights. His proven track record, sharp reads, and ability to break down complex matchups make him a trusted voice among both casual bettors and seasoned sharps.
Published on: March 13, 2026
Last updated: March 16, 2026