Most MLB bettors are stuck playing game totals and moneylines. Meanwhile, the first-inning NRFI/YRFI market is sitting there every night — soft, consistent, and beatable.

Here's why:

Sportsbooks price F1 NRFI/YRFI on aggregate pitcher data — not split data.

They use season-long ERA and WHIP to set the line. But starting pitchers are wildly inconsistent in the first inning specifically, and that inconsistency follows clear, modelable patterns:

• Some aces who look dominant overall are terrible openers. High contact, no swing-and-miss until they settle in after 15-20 pitches.

• Some #3 or #4 starters are elite first-inning pitchers because their first-pitch strike rate is high and lineups haven't adapted to their sequencing.

• Home/away splits in the first inning are dramatically larger than full-game splits — especially for pitchers who rely on crowd energy and familiarity.

The model I built tracks all of this.

First-inning strikeout rate. First-inning contact rate. First-pitch strike percentage in inning 1. How the opposing lineup performs against that pitcher's primary pitch in the first 15 pitches of the game.

The books haven't caught up to first-inning split modeling at this level of granularity. That window won't stay open forever.

If you're an MLB bettor and you're not in the F1 market, you're leaving real edge on the table every night. ⚾