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.

What Does +7 Spread Mean In Betting? If the spread in betting is seven points for a game, it means the underdog is getting seven points, noted with a + symbol as the underdog, which would be +7 on the odds. A team posted at -7 is the favorite, which is noted with a - symbol as the favorite and is laying seven points.