NRFI and YRFI: will anyone score in the 1st?
NRFI means No Run First Inning: you win if neither team scores in the 1st. YRFI is the opposite: at least one run scores. It is a quick bet decided in the first half-hour of a game.
Reviewed Oct 15, 2026
Answer first
90s- 01NRFI wins if the 1st inning ends 0-0.
- 02YRFI wins if either team scores in the 1st.
- 03Top hitters bat first, so first innings are lively.
Key numbers
NRFI at a glance
In short
Key takeaways
- Both teams’ halves of the 1st count.
- Lead-off hitters are often a team’s best.
- Starting pitchers matter most.
- Prices near even mean small edges.
Progress
How NRFI settles
- 1
Top of 1st
Away team bats
- 2
Bottom of 1st
Home team bats
- 3
Any run
YRFI wins
- 4
No runs
NRFI wins
- 5
Rest of game
Does not matter
If the 1st inning is not completed, the bet is usually void.
Odds and implied chance
| Odds | Implied chance | $10 bet returns |
|---|---|---|
| -140 | 58.3% | $17.14 |
| -120 | 54.5% | $18.33 |
| -110 | 52.4% | $19.09 |
| +100 | 50% | $20 |
| +110 | 47.6% | $21 |
Implied chance before margin. Returns include stake.
How the bet works
The first inning has two halves. The away team bats in the top, the home team in the bottom. NRFI needs both halves to end without a run. YRFI needs just one run from either side.
Because both teams must be held scoreless, NRFI is really two smaller bets in one. If each half-inning has a 73% chance of being scoreless, the chance both are is 0.73 × 0.73, or about 53%.
Lineups are set so the best hitters bat early. The top three or four hitters see the 1st inning almost every game, which is why the first inning scores more than an average inning. Later innings often see the bottom of the order instead.
Half-inning chances and NRFI
| Each half scoreless | Both halves (NRFI) | YRFI |
|---|---|---|
| 70% | 49.0% | 51.0% |
| 73% | 53.3% | 46.7% |
| 75% | 56.3% | 43.7% |
| 78% | 60.8% | 39.2% |
| 80% | 64.0% | 36.0% |
Our own sums, treating the halves as independent.
What drives first-inning scoring
Starting pitchers are the main factor. A pitcher who is sharp early and limits walks and home runs helps NRFI. Some pitchers are known for shaky first innings before they settle in.
Top-of-order hitters matter as much. A lineup with high on-base hitters at the top and power in the 3 and 4 spots makes a first-inning run more likely.
Ballparks and weather play a part. Hitter-friendly parks, warm air and wind blowing out push scoring up. Cold nights and big parks push it down.
Sequence
Making an NRFI or YRFI bet
Step 01
Check both starters
Early-inning form.
Step 02
Look at the top 4 hitters
On-base and power.
Step 03
Check park and weather
Wind and heat.
Step 04
Convert the price
Odds to implied chance.
Step 05
Compare books
Small edges need good prices.
Rules and settlement
If the first inning is not completed, for example if rain stops play before the bottom of the 1st ends, most books void the bet. If the away team scores in the top of the 1st, YRFI wins right away, and some books settle it then.
Listed-pitcher rules may apply. If a named starter is scratched, some books void the bet; others let it stand. Read the house rules.
Because NRFI is priced near even, the book’s margin takes a large share of any edge. Small gains in price add up over many bets, so compare at least two or three licensed books before you bet.
Floor rules
NRFI terms
Know before you sit
- NRFI
- No Run First Inning.
- YRFI
- Yes Run First Inning.
- Half-inning
- One team’s turn at bat.
- Top of the order
- First hitters in the lineup.
Common mistakes
- Forgetting both halves count
- One run from either team ends NRFI.
- Ignoring weather
- Wind changes scoring.
- Betting at any price
- Margins are tight.
- Missing lineup changes
- Rest days matter.
Keep reading
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01Basics
What does NRFI mean?
No Run First Inning. The bet wins if neither team scores in the 1st inning of the game.
What does YRFI mean?
Yes Run First Inning. The bet wins if at least one run scores in the 1st, by either team.
Do both teams have to be held scoreless?
Yes. NRFI needs both the top and bottom of the 1st to end with no runs. Rules differ between licensed sportsbooks, so read the house rules.
02Odds
What are typical NRFI odds?
Often near even money, such as -130 to +110, depending on pitchers, lineups and parks.
How do I estimate NRFI chance?
Multiply the chance each half-inning is scoreless. At 75% each, NRFI is about 56%.
Why do first innings score more?
The best hitters bat at the top of the order and almost always come up in the 1st.
03Rules
What if rain stops the game in the 1st?
If the inning is not completed, most books void the bet and return your stake. Rules differ between licensed sportsbooks, so read the house rules.
Does a pitcher change void the bet?
At some books a scratched listed starter voids it; others let it stand, so check.
Where can I get help?
If betting stops being fun, call or text 1-800-GAMBLER for free, private help. Rules differ between licensed sportsbooks, so read the house rules.
Sources
- MLB — Official rules Not from a registry (Reference source, not an official registry) · accessed Oct 15, 2026Game length and scoring
- Baseball Reference — MLB stats Not from a registry (Reference source, not an official registry) · accessed Oct 15, 2026League and player statistics
- Wikipedia — Fixed-odds betting Not from a registry (Reference source, not an official registry) · accessed Oct 15, 2026Odds formats and implied chance
- National Council on Problem Gambling — Help and resources Not from a registry (Reference source, not an official registry) · accessed Oct 15, 2026Free, confidential help: call or text 1-800-GAMBLER