MLB Moneyline & Run Line

The moneyline and the run line are the two primary sides of an MLB game. Because baseball is low-scoring and pitcher-driven, they behave very differently from a football spread. This guide supports our full MLB betting guide.

MLB moneyline betting

The moneyline is a straight bet on who wins — the dominant way to bet baseball. In a sport where a huge share of games are decided by one or two runs, simply picking the winner is the natural market. Favorites carry a minus price (-150 risks $150 to win $100) and underdogs a plus price (+135 returns $135 on $100). Because baseball has so much built-in variance, even strong favorites rarely reach the lopsided prices common in other sports, which keeps underdogs live and moneyline value plentiful.

Pitching sets the price

The single biggest input to a moneyline is the starting-pitcher matchup. An ace on the mound can turn a mediocre team into a favorite; a spot starter can flip the line the other way. Bullpen strength, lineup form, and ballpark factor in too, but the starters lead. This is why you should bet listed pitchers — if a probable starter is scratched, a listed bet voids rather than sticking you with a matchup you didn't handicap.

The run line

The run line is baseball's spread, and it's almost always fixed at 1.5 runs. The favorite at -1.5 must win by two or more runs to cover; the underdog at +1.5 covers by losing by exactly one run or by winning outright. Because so many baseball games are one-run affairs, that half-run of cushion is significant.

When to use the run line

• Laying -1.5 with a strong favorite. If you expect a comfortable win — a dominant ace against a weak lineup — taking -1.5 pays more than the pricey moneyline. The risk is the one-run win that cashes the moneyline but loses the run line.
• Taking +1.5 with an underdog. Backing a live underdog at +1.5 gives you a cushion: you win if your team loses by one or wins outright. The trade-off is a lower payout than the underdog moneyline.

Reading the moneyline and run line together tells you how the market sizes up a game. A heavy moneyline favorite with an expensive -1.5 signals a team expected to win comfortably; a cheap +1.5 underdog price suggests the book sees a likely close game.

Practical tips

• Handicap the pitchers first, then the lineups and bullpens.
• Bet listed pitchers to avoid getting burned by a scratch.
• Consider the run line on big favorites to avoid laying an expensive moneyline price.
• Value the underdog. Baseball's variance keeps underdogs alive far more than in other sports.

The moneyline pairs with the over/under covered in our totals and first five innings guide, and both hinge on the pitching analysis behind our pitcher props.