What the MLB Run Line Actually Means
Unlike the NFL, where a point spread can land anywhere from 1 to 14 points, MLB baseball almost always uses a fixed 1.5-run line. The favorite must win by two or more runs to cover; the underdog covers if it wins outright or loses by exactly one run. Oddsmakers adjust the price — the juice or vig — to balance action on
both sides rather than moving the run line itself. That means a -1.5 favorite might be priced at -160 while the +1.5 underdog sits at +140. Knowing that relationship helps you decide whether a run line or moneyline wager fits your read on a specific pitching matchup. Access depends on your state law and eligible regions.