Breaking Down the MLB Run Line
The standard MLB run line is set at 1.5 runs — the favorite gives 1.5 and the underdog gets 1.5. Unlike NFL point spreads that shift widely, baseball's run line almost always stays fixed at that number while the price (the juice) does the adjusting. A heavy favorite at -180 on the moneyline might become -240 on the run line because you're
now asking them to win by two or more. The underdog flips the other direction: a team at +160 on the moneyline can pay less on the run line because they only need to lose by one to cover. Understanding that price-versus-number tradeoff is the core skill in MLB spread betting.