Point spread betting explained: run lines, puck lines, and soccer handicaps on Polymarket

A team at -1.5 has to win by two or more, so the line loses every game decided by one, whichever team wins it. How often that happens depends on the sport. The NHL rate in the chart above is high because a shootout always ends as a one-goal game, and soccer's is higher still because a draw beats -1.5 too.

A point spread evens out a game between two unequal teams by asking the stronger one to win by more than a number. A team at -3.5 has to win by 4 or more. The other team, at +3.5, wins the bet by winning the game or losing by 3 or fewer. Backing the team at minus is laying the points, and backing the team at plus is taking them.

Baseball calls its spread the run line, hockey the puck line and soccer the handicap, and in all three the usual line is 1.5. Before you lay it, ask how often your sport ends by one: in soccer, -1.5 lost almost two matches in three.

Polymarket lists each line as a separate market, titled with the team giving the points: "Spread: Detroit Tigers (-1.5)", with the two teams as the outcomes. The rules resolve it to the Tigers if they "win the game by 2 or more runs" and to the other team otherwise. A tie goes to the team taking the points, a game cancelled with no make-up settles 50-50, and NHL spreads count overtime and shootouts, with a shootout adding one goal to the winner.

A game often carries a ladder of lines, for both teams. The Bills and Texans NFL game on September 13, 2026 had 35 spread markets, from Bills -0.5 to -21.5 and Texans -1.5 to -21.5, so the team at minus on a given line is not always the favorite. All but 6 of 79,769 settled spread markets used a half-point line, and those 6 were college football. A Polymarket spread almost never lands on the number, so there is no push to plan for.

A spread share pays $1 if its side covers, so its price is the market's chance of covering. Each extra point you lay removes the games won by exactly that margin, and in the NFL more games end on 3 than on any other margin. That is why the step past 3 was the biggest drop on the ladder in the chart above, for both teams.

If Tigers -1.5 trades at 45¢, the market gives the Tigers a 45% chance of winning by two or more, and Rockies +1.5 on the same market is the other 55%. $100 of the Tigers at 45¢ buys 222 shares that pay $222 if they cover.

At a sportsbook both sides of a spread usually sit at -110, which implies 52.4% each and 104.8% together; the 4.8 points over 100 is the book's margin. On Polymarket the two sides of a line add up to about $1, so choosing a line is choosing how much margin to buy, at a price you can see before you buy it.

In MLB the run line lost to a one-run game in 29.1% of 1,882 games, give or take 2.05 points, and the month did not change it much: the rate ran from 26.3% in April to 33.9% over the first 168 games of September, the smallest month. The spreads study has the method, and the MLB guide covers the other markets on a game.

That rate is the trade-off in one number. Backing a team at -1.5 instead of on the moneyline gives up every one-run win for a cheaper price, so lay the run line when you expect a margin the moneyline price does not already carry.

Hockey's puck line works the same way at -1.5, with one difference in the rules: overtime and shootouts count, and a shootout win adds a goal to the winner, so a shootout always ends as a one-goal game.

In soccer a -1.5 handicap needs a two-goal win, and it loses to a draw as well as to a one-goal win. A -2.5 handicap needs a three-goal win, which came in 15.6% of 7,528 settled Polymarket matches by either team, so a -2.5 price is a bet on a rout.

A field goal decides more NFL games than any other margin, and a touchdown with its extra point comes next. So the half point either side of 3 and 7 is worth more than any other: laying -2.5 instead of -3.5 wins every game decided by exactly 3, 15.1% of the 571 NFL games in the chart above. When a game lists both lines, compare what the extra point costs with how often it decides a game.

Football spreads carry the most lines on Polymarket, 7.4 a game in college football and 5.9 in the NFL. The pricing results below do not cover football: the large-trade window starts in April 2026, after the 2025 seasons ended, and holds only 94 large football spread buys.

Betting folklore says to take the points, because the public backs the team giving them. On Polymarket in 2026 the data leans the other way. Across 30,158 large spread buys from April 2 to September 13, laying the points came in 4.68 points ahead of the price, with a market-resampled interval from 0.25 to 9.12, and taking the points came in 2.82 behind.

The lean showed most clearly in the NBA, where laying the points came in 5.32 points ahead and taking them 5.41 behind, each on an interval that reaches zero, and during play, where laying came in 6.00 ahead with an interval from 2.01 to 9.93. MLB run lines came in behind on both sides. Treat it as a lean, not a rule: judge each side on its price, and do not assume the team getting points is the value.

Football is the only sport where spreads drew more than a quarter of the volume on recent games (the chart above). Everywhere else the moneyline carries most of the money, so a run line, a puck line or a soccer handicap trades in a thinner book, where a limit order matters more than it does on an NFL spread.

Open any game from the sports hub for its event page. With Pro, its Markets section groups the game's markets by family, and the Spread family lists each line by its first outcome, such as "Detroit Tigers -1.5" with its volume, with the price on each side under the team's name: "-1.5 45¢" for the Tigers and "+1.5 55¢" for the Rockies.

The 24-hour and 1-hour change sit under the first outcome, and on a game with four or more families trading, a Volume by family bar shows how the money splits. Without Pro the section shows sample data.

Top holders, also Pro, lists the wallets holding each side with their grades. Recorded large spread taker fills that pass the feed filters appear in the large-trade feed, marked BUY or SELL with the wallet's grade: live with Pro, 24 hours behind with an account, and a day old on the public feed without signing in.