MLB Run Line Betting Guide

What Is the Run Line?

The run line is baseball's version of a point spread. Unlike football or basketball, the spread in MLB is almost always fixed at ±1.5 runs. The favorite must win by 2+ runs; the underdog can lose by 1 and still cover.

Run Line vs. Moneyline

The run line changes both the risk and the payout compared to the moneyline. Here's how they compare for the same game:

Taking the Yankees on the run line costs less (-130 vs -180) because you're now requiring them to win by 2. Taking the Rays on the run line pays less (+110 vs +155) because you're giving them the 1.5-run cushion.

When to Use the Run Line

Bet the run line favorite when:

• A dominant ace is starting (higher strikeout, lower blowout potential)
• The opponent's bullpen is exhausted from recent games
• The moneyline price (-200+) is too steep to justify the risk
• Historical data shows the team wins by 2+ more often than the market implies

Bet the run line underdog (+1.5) when:

• You expect a close game regardless of who wins
• You like the team but not at a price better than even
• The starting pitching matchup is very close

The First 5 Innings Run Line

Many sportsbooks also offer a F5 run line — the spread applies only to the first 5 innings. This isolates starting pitcher performance and removes bullpen variance, making it useful when you have a strong view on the starting pitching matchup.

Run Line Pushes

At ±1.5 runs, a push is mathematically impossible — no game ends in a half-run margin. However some books offer alternate run lines at ±1 or ±2, where pushes can occur if the final margin hits exactly that number.