What's at stake

Who wins the game and by how many runs determines the moneyline and every run-line contract on the card.

Total runs scored decides the 15.5 Over/Under and a single big inning or bullpen collapse can flip multiple spread and totals outcomes.

Who's in play

Starting pitchers, the two lineups, and each team's bullpen are the main actors who create the final score.

Everyday sluggers in the heart of the order, bench platoon replacements, and the managers' late-game decisions also materially affect which side covers the spread.

What drives it

Pitching matchups and bullpen depth shift win and run-line probabilities, especially lefty-righty splits and recent workload.

Park factors, wind and weather, hitter form, defensive alignment, and any late scratches or injuries will move prices before and during the game.

What to watch

Probable pitchers and official lineups, typically posted about an hour before first pitch, are the earliest decisive signals.

Track weather forecasts, bullpen usage from recent days, announced injuries or scratches, and first-inning scoring and starter pitch counts for key in-play pivots.