What Does a +1.5 Spread Mean? 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.

Money line bets are bets placed on a game's conclusion. The term money line  represents the payouts for winning the bet, with a negative integer for the underdog and a positive one for the favorite.