Line

Definition:

In sports betting, the line refers to the odds or point spread set by a sportsbook for a particular game or market. It’s the number that bettors wager against, whether it’s a spread, total, or moneyline. The line is designed to balance action on both sides of a bet.

They serve two main purposes:

1. Represent the sportsbook’s prediction or adjustment for an outcome.

2. Balance betting activity so the sportsbook minimizes risk and guarantees profit.

Real-World Example

NFL Game: Kansas City Chiefs vs. Baltimore Ravens

• Point spread line: Chiefs –3.5 (–110) / Ravens +3.5 (–110).

  • If the Chiefs win by 4 or more, they “cover the line.”

  • If the Ravens lose by 3 or fewer (or win outright), they cover their side of the line.

• Over/Under line: O/U 48.5 points.

  • Bettors choose whether the combined score goes over or under this line.