First Inning
First-inning research at a glance, then jump to Build for deeper filters.
A research terminal for the first-inning MLB market — NRFI (No Run First Inning) and YRFI (Yes Run First Inning). Pair the daily slate with a build bench that lets you test detailed first-inning theories against history. Detailed game-specific data when you want context on tonight's board, customizable filters when you want to pressure-test an angle that should hold across many games.
What you see on every game card
Each card on the daily slate is its own micro-report. The numbers describe that exact matchup — that starter, that lineup, that ballpark, that market — so the read stays specific to the game in front of you.
How reliably each starter has held the first inning scoreless across his recent body of work. Higher numbers read as a stronger NRFI lean for that pitcher; the rate is about that pitcher, not the inning as a whole.
How often each team has put a run on the board in the top or bottom of the first across their recent stretch. Reads how aggressively a lineup tends to attack the opener vs. settle in.
A vig-adjusted average of every book carrying a first-inning total, paired with our reference book — generally regarded as the sharpest line on the board. When the reference book is juicing one side noticeably harder than consensus, that is the sharper money's lean.
Ballparks bucket into a low / mid / high first-inning run environment. Combined with day vs. night and other game-state signals, this is the easy-to-read context that often decides borderline NRFI/YRFI calls.
What the build bench reports
The build bench applies your filter set to historical first-inning game results. You set the conditions; we report how the side performed across every game that matched.
The percentage of historical games matching every active filter where your chosen side (NRFI or YRFI) cashed. Sample size travels with the rate so you always see what you're working with.
Average total first-inning runs across the matched sample. Sub-1 reads as a system that suppresses early scoring; 1.2+ reads as a system that produces it. A blunt but useful pulse on how the games actually play.
Most recent consecutive run on your side. Positive numbers are consecutive hits; negative are consecutive misses. Useful for spotting hot or cold streaks before betting into them.
Unit profit/loss assuming you bet exactly 1 unit at -110 on every matched game. We suppress this when the sample is too thin to be meaningful — small samples can lie.
A horizontally scrolling strip of the last 50 matched games, newest first. Each pill carries the two team logos with a hit/miss mark; hover to see game date, start time, the first-inning score, and the line.
Why the data is good
The product is built around reading the first inning faster and more honestly than what a sportsbook UI gives you.
We compile first-inning data for every MLB game on the slate. No cherry-picked picks of the day — you see the full board and decide what to bet.
Pitcher splits, team early-pressure rates, ballpark context, and market signal sit on one card. The same numbers on a sportsbook would take ten tabs.
The build bench lets you run any combination of conditions against history and measure how the side actually performed. Trust the data, not the screenshot.
Consensus is the vig-removed market average across every book carrying the line. Pairing it with the sharpest book on the board gives you a fast read on where smart money is — without doing the math yourself.
Frequently asked
Do you give me picks, or do I read the data myself?
First Innings is a research terminal, not a tipster service. Every card carries the data you need to make the call yourself — pitcher consistency, team early-pressure rates, park environment, and the sharper-book lean — but the pick is yours. No daily "play of the day" emails, no push notifications telling you what to bet.
What's the difference between today's slate and the build bench?
The slate is your daily read: every MLB game on the board with first-inning context per matchup. The build bench is where you go when you have a theory — "NRFI when a left-handed sub-3 ERA pitcher is at home as a -150 favorite," for example — and want to see how it cashed across history. Same data, two different angles.
How fresh is the data?
Lines, lineups, and probables refresh on a steady cadence throughout the day, all the way up to first pitch. By the time you're shopping a line, what we're showing is current.
Is First Innings free?
Yes. The full daily slate is free — every matchup, every day. No subscription required.