A +1.5 spread is commonly seen in baseball betting, the standard runline  for MLB. This spread means the underdog must win outright or lose by exactly one run to cover the spread. Alternatively, a -1.5 spread means that the favorite must win by at least two runs. Many baseball games are decided by fewer than two runs.

How Does Over 1.5 Work in Different Sports? In different sports, over 1.5 meaning refers to a bet on the total number of goals, points, or runs scored in a match or game. For example, in soccer, if you place an over 1.5 bet, it means you are predicting that there will be two or more goals scored in the match.