The negative value of -1.5, for example, would represent a team favored by 1.5 runs. The positive value +1.5 indicates a team is the underdog by 1.5 runs. Picking the favorite to beat the runline means the team has to win 4-2 or some other final like that. If you want to bet on that -190 favorite, you would risk $190 to win $100. On the +170 underdog, you would bet $100 for the chance to turn a $170 profit if the underdog wins. Read more
