A point spread is the most popular form of sports betting, serving as a reference for how oddsmakers and the betting public view one team relative to another. The spread is determined by oddsmakers and represents a winning margin for the favorite, making a bet on either side a near 50/50 proposition.
How the Point Spread Works
For example, if a matchup between the New England Patriots and Seattle Seahawks has a spread of 3.5 points with Seattle favored, bettors backing the Seahawks need Seattle to win by four or more points. Bettors backing the Patriots win if New England wins outright or loses by three or fewer points. Spread odds are typically -110 on both sides (wager $110 to win $100), while moneyline odds for the favorite carry higher risk (e.g., -185).
When and Why Lines Move
Spread lines can shift based on betting volume. If a large portion of bets favor one team, sportsbooks adjust the spread to balance the handle. Sharp bettors with strong winning records can also influence line movement, as can line changes at competing sportsbooks. Major player injuries or lineup decisions cause immediate fluctuations, with the affected team becoming a longer underdog or shorter favorite.
Spreads Across Different Sports
Spreads represent point differentials in NFL, college football, NBA, and college basketball. In MLB, spreads are called run lines and are generally set at 1.5 runs; favorites on the run line often carry plus odds, while underdogs carry minus odds. NHL spreads are known as puck lines and operate similarly. Soccer spreads are typically used only for heavy favorites to obtain stronger odds. Tennis offers set spreads, usually -1.5 sets for the favorite and +1.5 for the underdog.
Tips for Spread Betting
In college football, top teams often schedule weak non-conference opponents, creating massive spreads up to 50 points. These lines are best avoided because they require large wagers for minimal returns. Betting on home underdogs is generally profitable, as teams tend to play better in front of their own fans; most major upsets in college sports occur at home. This effect is less pronounced in professional leagues where player professionalism mitigates road pressure.
Frequently Asked Questions
Point spread bets carry risk like all sports betting, but are not inherently riskier than other markets. Parlays of spread bets are allowed at most sportsbooks but are generally not advised due to improper implied win probability in the odds. Bettors can place spread bets at any reputable sportsbook; shopping for the best lines is recommended. Most spread bets come with -110 odds on both sides, implying relatively equal chances for each side to cover.
