Run line favorites betting strategy, baseball

The run line is baseball's answer to expensive favorites: lay 1.5 runs and a 1.30 moneyline becomes a near-even price. The trade-off is real, one-run wins are common in baseball, so the backtest has to show that qualifying favorites win big often enough to cover the difference.

How the filter tree works

• Favorite side: the home team must be the market favorite.
• Odds range: the home side's price on the -1.5 run line must close between 1.70 and 2.10.

The odds window keeps the sample where the run line is competitively priced rather than distorted by extreme matchups.

What to watch

• One-run games decide this system. Bullpens, late substitutions and extra innings all push results toward narrow margins.
• Home favorites have a quirk: leading home teams skip the bottom of the ninth, which statistically trims home blowout margins.
• With 162 games per team, samples build fast, one honest advantage of baseball systems.

Tweaks to try

• Compare against the same favorites on the moneyline to price the 1.5 runs directly.
• Add a month filter to avoid April's cold-weather noise.
• Add a conceded-runs cap on the opponent for a matchup angle.

Backtest it across seasons in backtesting on Pinnacle closing odds for baseball.