The moneyline is the simplest MLB bet — pick the winner. But pricing varies hugely with favorite size. Here's how it works, when it has value, and how to read the implied probabilities.
The moneyline is the simplest bet in MLB: pick which team wins, no spread, no total. Odds are expressed in American format. A -150 price means you bet $150 to win $100 (favorite). A +135 price means you bet $100 to win $135 (underdog). The bigger the favorite, the more juice you pay.
Odds map to implied probability. A team at -150 implies a market belief of about 60% they win (calculation: 150 / (150+100) = 0.60). A team at +150 implies about 40%. Both numbers include vig, so the true "fair" probability is slightly different — typically the favorite's implied probability is inflated by ~2-3 percentage points to cover the book's cut.
Moneyline value usually shows up on:
Our model produces a probability for every side, blends with market and closing-line at calibrated weights, and computes an EV vs the de-vigged price. Picks with positive EV at the moneyline price get a non-zero stake. The displayed pick is whichever side has the higher edge — sometimes that's the dog despite a lower win probability.
-300 → ~75% implied · +250 → ~28%-200 → ~67% implied · +170 → ~37%-150 → ~60% implied · +130 → ~43%-110 → ~52% implied · -110 → ~52% (push, vig only)+110 → ~48% implied · +110 → ~48%