How to bet the MLB run line profitably. When to back the favorite's -1.5 and when to take the dog at +1.5.
The run line is baseball's version of a point spread, set at 1.5 runs. Instead of -110, the odds vary significantly: a team favored by -1.5 might pay +145, while the underdog at +1.5 might be -175. Unlike football spreads, the run line doesn't change — only the odds do.
The -1.5 run line on favorites offers plus-money value when: the favorite has an elite starting pitcher vs a weak lineup, the underdog's bullpen is exhausted from recent heavy use, the matchup is a blowout spot (top offense vs bottom pitching). Look for +120 to +160 on strong favorites.
The +1.5 underdog is one of the safest bets in baseball when used correctly. Teams lose by 1 run less often than most people think. The +1.5 at -175 breaks even at 63.6% — easily achievable when backing quality underdogs with ace starters.
First-5 betting removes the variable of bullpens entirely — you're just betting on the starting pitcher matchup. In a sport where bullpen luck is highly random, this gives you a cleaner edge. Our models show +8.2% ROI on first-5 picks versus +5.1% on full-game picks.
Run line odds vary more across sportsbooks than in any other sport. A team might be -1.5 +145 at DraftKings and -1.5 +135 at FanDuel. That 10-cent difference compounds dramatically over a full season. Always have accounts at 3+ books.
Our AI models pick the best bets daily. Follow along free.
See Today's MLB Picks →