What's at stake

A single regular-season game decides head-to-head win/loss and affects standings, run-scoring totals, and bullpen workload.

Markets here include winner (moneyline), total runs, spreads at multiple run thresholds, and whether a run scores in the first inning.

Who's in play

Starting pitchers and their early-inning effectiveness are primary influencers.

Scheduled starters, top hitters, bench bats, bullpen depth, and managers' in-game decisions determine scoring bursts, bullpen usage, and final margins, plus recent form and any injury status.

What drives it

How both managers deploy starters and relievers, plus matchup-specific platoon advantages, will shift odds throughout the day.

Ballpark factors, weather, lineup changes, recent form, and any late scratches alter over/under and spread price movement.

What to watch

Look for the announced starting pitchers and batting orders; starters are typically named about an hour before first pitch but sometimes earlier.

Also monitor weather, infield/outfield conditions, first-inning pitching lines, bullpen availability reports, and official injury updates that can change markets pre-game.