What Does "Cover" Mean in Sports Betting?
In sports betting, to "cover" or "cover the spread" means to win a bet placed on a point spread. It's not simply about which team wins the game—it's about whether that team wins (or loses) by a specific margin of points set by the sportsbook. This distinction is fundamental to understanding point spread betting, one of the most popular wagering formats in sports.
The term "cover" comes from the idea that a team must exceed or "beat" the handicap (the point spread) set by oddsmakers. When a team covers the spread, bettors who wagered on that team win their bet. When a team fails to cover, those bettors lose, regardless of whether their team won the game outright.
Why "Cover" Matters to Bettors
Understanding covering the spread is essential because it determines whether your bet wins or loses. A team can win the game but fail to cover the spread, leaving bettors who backed them with a loss. Conversely, a team can lose the game yet cover the spread, resulting in a win for those who bet on them. This is why point spread betting requires understanding not just the outcome of the game, but the margin of victory.
For serious bettors, tracking which teams cover spreads (known as "ATS records") becomes a crucial part of evaluating team performance and identifying betting value. A team with a strong winning record might have a poor record against the spread, suggesting the sportsbook has accurately priced their ability.
How Does Covering the Spread Work for Favorites?
The favorite is the team expected to win, indicated by a minus sign (-) next to the point spread. For the favorite to cover the spread, they must win the game by more than the assigned point spread.
Understanding the Favorite's Margin
When you see a line like "Dallas Cowboys -7.5," the minus sign indicates the Cowboys are favored by 7.5 points. For bettors who wagered on the Cowboys to cover, the team must win by 8 or more points. If they win by exactly 7.5 points (which is impossible due to the half-point), or by fewer points, they have failed to cover.
The half-point (or "hook") is intentionally used by sportsbooks to eliminate the possibility of a "push" (tie), where neither side wins or loses. This ensures every spread bet has a winner and a loser.
| Team | Spread | Final Score | Margin | Cover Result |
|---|---|---|---|---|
| Dallas Cowboys | -7.5 | Cowboys 28, Philadelphia 20 | +8 | ✓ Covered |
| Dallas Cowboys | -7.5 | Cowboys 26, Philadelphia 20 | +6 | ✗ Failed to Cover |
| Kansas City Chiefs | -6 | Chiefs 24, Denver 18 | +6 | ✗ Failed to Cover (Exactly 6, needed 7+) |
| Kansas City Chiefs | -6 | Chiefs 25, Denver 18 | +7 | ✓ Covered |
Real-World Examples from the NFL
Example 1: The Comfortable Cover
The New England Patriots are favored by -3.5 against the Miami Dolphins. The final score is Patriots 24, Dolphins 17. The Patriots won by 7 points, which exceeds the 3.5-point spread. Bettors who wagered on the Patriots -3.5 win their bet.
Example 2: The Close Miss
The Green Bay Packers are favored by -5.5 against the Chicago Bears. The final score is Packers 20, Bears 17. The Packers won by only 3 points, falling short of the 5.5-point requirement. Bettors who backed the Packers -5.5 lose their bet, despite their team winning the game.
Example 3: The Blowout
The San Francisco 49ers are favored by -10 against the Arizona Cardinals. The final score is 49ers 38, Cardinals 10. The 49ers won by 28 points, far exceeding the 10-point spread. Bettors who wagered on San Francisco win comfortably.
How Does Covering the Spread Work for Underdogs?
The underdog is the team expected to lose, indicated by a plus sign (+) next to the point spread. Underdogs can cover the spread in two ways: by winning the game outright or by losing by fewer points than the spread.
The Two Ways an Underdog Covers
When you see a line like "New York Jets +4.5," the plus sign indicates the Jets are underdogs by 4.5 points. For bettors who wagered on the Jets, the team can either:
- Win the game, or
- Lose by 4 points or fewer
This flexibility makes underdog betting attractive because the team doesn't need to win to cover the spread—they just need to keep the game closer than expected.
| Team | Spread | Final Score | Margin | Cover Result |
|---|---|---|---|---|
| New York Jets | +4.5 | Jets 21, Miami 20 | -1 (Jets win) | ✓ Covered |
| New York Jets | +4.5 | Jets 20, Miami 22 | -2 (Lose by 2) | ✓ Covered |
| New York Jets | +4.5 | Jets 18, Miami 24 | -6 (Lose by 6) | ✗ Failed to Cover |
| Denver Broncos | +7 | Broncos 17, Kansas City 24 | -7 (Exactly 7) | ✗ Failed to Cover (Needed -7 or better) |
| Denver Broncos | +7 | Broncos 17, Kansas City 23 | -6 (Lose by 6) | ✓ Covered |
Real-World Examples from the NBA
Example 1: The Underdog Win
The Memphis Grizzlies are +6 underdogs against the Los Angeles Lakers. The final score is Grizzlies 112, Lakers 108. The Grizzlies won outright, which means they covered the spread. Bettors who wagered on Memphis win their bet.
Example 2: The Moral Victory
The Charlotte Hornets are +8 underdogs against the Boston Celtics. The final score is Celtics 110, Hornets 105. The Hornets lost by 5 points, which is less than the 8-point spread. Even though they lost the game, bettors who backed Charlotte +8 win their bet because the team covered the spread.
Example 3: The Underdog Letdown
The San Antonio Spurs are +10 underdogs against the Golden State Warriors. The final score is Warriors 125, Spurs 107. The Spurs lost by 18 points, far exceeding the 10-point spread. Bettors who wagered on San Antonio fail to cover.
What Is the Difference Between Covering and Winning?
This is one of the most important distinctions in sports betting, and understanding it separates casual bettors from informed ones. Covering the spread and winning the game are two different outcomes.
Covering vs. Winning Outright
A team can win the game without covering the spread. They can also lose the game while covering the spread. The spread is a handicap that adjusts the final score for betting purposes.
| Scenario | Favorite Example | Underdog Example |
|---|---|---|
| Team Wins & Covers | Cowboys -7, beat Eagles 28-20 (won by 8) | Jets +4.5, beat Dolphins 21-20 (won outright) |
| Team Wins but Doesn't Cover | Cowboys -7, beat Eagles 24-20 (won by 4) | Jets +4.5, beat Dolphins 21-20 (won by 1, but spread was +4.5) |
| Team Loses but Covers | Cowboys -7, lose to Eagles 20-18 (lost by 2) | Jets +4.5, lose to Dolphins 22-20 (lost by 2) |
| Team Loses & Doesn't Cover | Cowboys -7, lose to Eagles 28-20 (lost by 8) | Jets +4.5, lose to Dolphins 30-20 (lost by 10) |
Real Example: The Green Bay Packers are -7.5 favorites over the Chicago Bears. The Packers win the game 24-20 (a 4-point margin). In this scenario:
- The Packers won the game outright (they beat the Bears)
- The Packers failed to cover the spread (they only won by 4, but needed to win by 7.5+)
- Bettors who backed the Packers -7.5 lose their bet
- Bettors who backed the Bears +7.5 win their bet
Why This Distinction Matters
The spread is set by oddsmakers to balance betting action on both sides. A team's ability to cover spreads is often more indicative of their true strength than their win-loss record. A team might have a 10-6 record but only cover 40% of their spreads, suggesting oddsmakers have accurately priced their ability. Conversely, a team with an 8-8 record might cover 60% of spreads, indicating they're undervalued by the market.
This is why serious bettors track Against the Spread (ATS) records rather than relying solely on straight-up wins and losses.
What Are ATS Records and How Do They Work?
ATS stands for "Against the Spread." An ATS record tracks how many times a team has covered the spread versus failed to cover it. This metric is invaluable for evaluating team performance and identifying betting opportunities.
Understanding ATS (Against the Spread) Records
An ATS record is typically displayed as three numbers separated by hyphens, for example: 12-8-1. This notation means:
- 12 = Number of games the team covered the spread (wins)
- 8 = Number of games the team failed to cover (losses)
- 1 = Number of games that resulted in a push (tie)
The team's ATS record for this stretch would be "12-8 ATS" (the push is often omitted in casual discussion). This tells you that out of 21 games, the team covered the spread 12 times, a coverage rate of approximately 57%.
How to Read and Interpret ATS Records
ATS records reveal important information about team performance relative to market expectations. A team with a strong straight-up record but a weak ATS record suggests the sportsbook has accurately priced their ability—they're winning games, but not by the margin expected.
| Team | Straight-Up Record | ATS Record | ATS % | Interpretation |
|---|---|---|---|---|
| Team A | 14-6 | 12-8 | 60% | Strong team, slightly undervalued by market |
| Team B | 12-8 | 10-10 | 50% | Decent record, accurately priced by market |
| Team C | 10-10 | 12-8 | 60% | Mediocre record, undervalued by market |
| Team D | 15-5 | 8-12 | 40% | Excellent record, overvalued by market |
Team A has a great 14-6 record and covers spreads 60% of the time, suggesting they're a strong team that might be slightly undervalued.
Team C has an unremarkable 10-10 record but covers spreads 60% of the time, suggesting the market has overestimated their weakness—they're actually a better bet than their record indicates.
Team D has an excellent 15-5 record but only covers spreads 40% of the time, suggesting the market has heavily bet on them based on their success. The sportsbook has adjusted the lines accordingly, making them a poor value bet.
ATS Records vs. Straight-Up Records
A team's ATS record and straight-up (SU) record can differ significantly. The SU record simply tracks wins and losses. The ATS record tracks whether the team beat the handicap set by oddsmakers.
A team might be 10-10 straight-up but 12-8 ATS, meaning they've won half their games but covered the spread in 60% of their contests. This discrepancy occurs because oddsmakers adjust their spreads based on public perception, injury reports, and other factors beyond pure team strength.
Professional bettors often use ATS records as a primary tool for identifying value. If a team has a strong ATS record, it suggests they're consistently outperforming market expectations. If a team has a weak ATS record despite a strong SU record, it suggests the market has caught up to their success and they may be overvalued.
How Do Sportsbooks Set Point Spreads?
Understanding how spreads are created provides insight into why covering the spread is distinct from winning the game.
The Purpose of Point Spreads
The point spread was invented by mathematician Charles K. McNeil in the early 1940s and introduced to sports betting shortly thereafter. McNeil's innovation was revolutionary: instead of betting on which team would win (moneyline betting), bettors could now wager on whether a team would win by a certain margin.
The primary purpose of the point spread is to balance betting action on both sides of a wager. When one team is significantly more talented than another, few bettors would bet on the underdog at equal odds. By giving the underdog points, sportsbooks create attractive odds for both sides, encouraging roughly equal amounts of money to be wagered on each team.
This balance is crucial for sportsbooks because they profit from the "vig" or "juice"—typically a 10% commission on losing bets. If all the money flows to one side, the sportsbook faces substantial risk.
Factors That Influence Spread Size
Oddsmakers don't simply guess at spread numbers. They consider multiple factors:
Team Strength & Talent
The primary factor is the relative quality of the two teams. A team with elite players and a strong defense will be favored against a weaker team.
Home Field Advantage
Playing at home provides a measurable advantage, typically worth 2.5-3 points in football and 3-4 points in basketball. A team that would be evenly matched on a neutral field might be a 3-point favorite at home.
Injuries & Roster Changes
The loss of a star player can shift a spread by several points. Sportsbooks monitor injury reports closely and adjust lines accordingly.
Schedule & Rest
A team playing their third game in four nights faces fatigue that might warrant a 1-2 point adjustment. A team with a week of rest might receive a favorable adjustment.
Public Perception & Betting Trends
If heavy betting action flows to one side, sportsbooks may adjust the line to balance the money. This creates opportunities for sharp bettors who recognize when a line has been moved unfavorably.
Historical Matchups & Trends
Some teams perform unusually well or poorly against specific opponents or in particular situations (e.g., teams with strong home records but weak road records).
Weather & External Factors
In football, extreme weather can affect the spread. A team with a strong passing game might face a larger spread in heavy wind or snow.
Key Numbers in Spread Betting
In football and basketball, certain point margins occur more frequently than others due to the structure of scoring. These "key numbers" represent critical thresholds where the spread often lands.
In NFL Football:
- 3 points — The most common margin of victory. A field goal separates many games.
- 7 points — A touchdown is the second most common margin.
- 10 points — A touchdown plus a field goal.
- 14 points — Two touchdowns.
Because these numbers occur frequently, the value of a spread can change dramatically around them. A spread of -2.5 is significantly more valuable than -3.5 because of the prevalence of 3-point margins. Sportsbooks adjust their odds (the "vig") around key numbers to account for this.
In NBA Basketball:
- 3 points — A three-pointer is the most common margin.
- 5-7 points — Common margins in basketball games.
Understanding key numbers helps bettors recognize when they're getting good value. A team favored by -2.5 is more valuable than the same team favored by -3.5, all else being equal, because they're more likely to cover.
What Is a Backdoor Cover?
A backdoor cover occurs when a team that appears to be losing late in a game scores in the final moments and covers the spread despite the loss.
Definition and How It Happens
Imagine a scenario: The favorite is ahead 20-10 with two minutes remaining, and bettors who wagered on the underdog think they've lost. Then the underdog scores a quick touchdown and a two-point conversion, making it 20-18. The underdog has covered the spread despite losing the game.
From the perspective of bettors who wagered on the favorite, this is heartbreaking. Their team won the game, but failed to cover the spread, resulting in a loss. From the perspective of underdog bettors, it's an unexpected gift—their team lost but they won their bet.
Backdoor covers are particularly common in blowout games where the trailing team scores meaningless points late in the game when the outcome is already decided. In these situations, the leading team often relaxes defensively, allowing the opponent to score easily.
Famous Examples
The 2018 NFL Season Example
In a Monday Night Football game, the New England Patriots were heavily favored and led comfortably late in the fourth quarter. The opposition scored two quick touchdowns in the final minutes, covering a large spread despite losing decisively. This type of scenario has occurred countless times across sports.
College Football Backdoor Covers
In college football, backdoor covers are particularly common because games often feature large point spreads. A team favored by 20+ points might relax in the final minutes, allowing the underdog to score and cover.
These situations highlight an interesting dynamic in sports betting: the outcome that matters most to bettors (covering the spread) is different from the outcome that matters most to teams (winning the game). Teams that have already secured a win may not be motivated to prevent a backdoor cover.
Common Misconceptions About Covering the Spread
Several myths persist about covering the spread. Understanding the truth behind these misconceptions will improve your betting acumen.
Misconception 1: "Covering the Spread Is the Same as Winning"
The Truth: Covering the spread and winning the game are two different outcomes. A team can win without covering or lose while covering. The spread is a handicap that adjusts for the difference in team quality. For favorites, they must win by more than the spread. For underdogs, they can lose and still cover.
This misconception leads many casual bettors to incorrectly evaluate their bets. They see their team won and assume they won their bet, without checking whether the team covered the spread.
Misconception 2: "All Favorites Must Win by the Spread"
The Truth: Favorites don't always cover their spreads. In fact, favorites cover spreads at roughly a 50% rate over large sample sizes (slightly less due to the vig). A favorite might win the game but fail to cover if they don't win by enough points. Similarly, a favorite might lose the game but still cover if they lose by fewer than the spread.
This misconception often leads bettors to believe that favorites are "safe" bets. In reality, covering spreads is difficult because oddsmakers have priced in the expected margin of victory. Favorites cover at roughly the same rate as underdogs over time.
Misconception 3: "The Spread Always Reflects the True Talent Gap"
The Truth: The spread reflects oddsmakers' estimate of the talent gap, adjusted for public perception, betting action, and other factors. If the public heavily bets one side, sportsbooks may adjust the line to balance action, even if they believe the original line was more accurate.
This creates opportunities for sharp bettors who recognize when a line has moved away from its "true" value. A team might be favored by 4 points, but if heavy public money has pushed the line to 5, the underdog might represent better value.
Frequently Asked Questions About Covering the Spread
Can an underdog cover if they lose the game?
Yes. An underdog covers the spread if they either win the game outright or lose by fewer points than the spread. For example, if the Jets are +4.5 underdogs and lose 22-20 (by 2 points), they have covered the spread because they lost by fewer than 4.5 points. Bettors who wagered on the Jets would win their bet.
What happens if a team wins by exactly the spread?
If a team wins by exactly the spread, the bet is a "push" or "tie." For example, if the Cowboys are -7 favorites and win 28-21 (by exactly 7 points), bets on the Cowboys -7 are pushed. Your original stake is returned without profit or loss. To avoid pushes, sportsbooks use half-points (e.g., -7.5 instead of -7).
How do I know if my team covered after the game?
To determine if your team covered, subtract the spread from the final margin of victory. If you bet on the favorite, they must win by more than the spread. If you bet on the underdog, they must either win or lose by fewer points than the spread. For example: Cowboys -7, final score Cowboys 28, Eagles 20. Margin of victory = 8 points. 8 > 7, so the Cowboys covered.
Do ATS records predict future performance?
ATS records provide useful historical context but have limited predictive power. A team's ATS record tells you how they've performed against the spread in the past, but it doesn't guarantee future results. However, teams with strong ATS records over multiple seasons may represent better value because they consistently outperform market expectations.
What's the difference between covering and "beating the spread"?
These terms are synonymous. "Covering the spread," "beating the spread," and "covering" all refer to the same outcome: a team's performance exceeds the margin set by the point spread, resulting in a winning bet for those who wagered on that team.
Why do sportsbooks use half-points in spreads?
Half-points (e.g., -7.5 instead of -7) are used to eliminate the possibility of a push. Without half-points, a spread of -7 could result in a push if the favorite won by exactly 7 points. The half-point ensures there's always a winner and a loser, which is important for sportsbooks' profitability.
Can I make money consistently by betting on teams with good ATS records?
While teams with strong ATS records have beaten the spread more often in the past, past performance doesn't guarantee future results. The sportsbook adjusts lines based on public perception and betting trends, so a team that covered spreads consistently last season might be overvalued this season as the market catches up. Consistent profitability requires understanding line value and identifying when the market has misprice a team.
Related Terms
- Point Spread — The handicap set by sportsbooks to balance betting action
- Against the Spread — Betting on whether a team will cover the point spread
- Push — A tie in betting where neither side wins or loses
- Moneyline — Betting on which team wins without a point spread
- Over/Under — Betting on the total points scored by both teams combined
- Parlay — A bet combining multiple spread bets for higher payouts
- Underdog — The team expected to lose
- Favorite — The team expected to win