NRFI Results

First-inning leans for September 8, 2026, graded from final box scores.

All-time lean record

283-226

509 graded

56%

hit rate

NRFI

154-12954%

YRFI

129-9757%

0-0 on 6 leans

NRFI 0-0 · YRFI 0-0

NRFI Leans

4
110 logo
CLE@
102 logo
BAL6:35 PM ET
NRFI lean
Model 55%Book -112.5 · 50%
Tanner Bibee
79% NRFI · 28 GS · 5/5 L5
CLE 1st: 27% (#25) · 26% vs hand
Brandon Young
71% NRFI · 24 GS · 4/5 L5
BAL 1st: 26% (#28) · 29% vs hand

Tanner Bibee has kept the first inning clean in 79% of his 28 starts, including each of his last five, and he draws an Orioles lineup that scores in the opening frame just 26% of the time — 28th in MLB. Brandon Young's 71% NRFI rate against a Cleveland offense at 26% versus righties keeps the other half quiet too. The model's 55% scoreless read sits five points above the book's 50%.

Oriole Park at Camden Yards · park run factor 100
  • NRFI lean — Tanner Bibee (79% NRFI) and Brandon Young (71%) have both buried the first inning, and neither lineup gets going early.
  • Books price this NRFI at -112.5 (50% implied); the model has it 55%.
  • The Baltimore Orioles score in the first in 26% of games, 28th-most in MLB, 29% against right-handers.
  • The Cleveland Guardians score in the first in 27% of games, 25th-most in MLB, 26% against right-handers.
115 logo
TEX@
114 logo
SEA9:40 PM ET
NRFI lean
Book -126.5 · 98%
TBD
Starter TBD
Awaiting probable starter
TBD
Starter TBD
Awaiting probable starter
T-Mobile Park · park run factor 83
  • NRFI lean — T-Mobile Park suppresses scoring (run factor 83), and the early-inning numbers back the under.
  • Books price this NRFI at -126.5 (98% implied).
  • The Seattle Mariners score in the first in 31% of games, 11th-most in MLB.
  • The Texas Rangers score in the first in 28% of games, 22nd-most in MLB.
120 logo
WSH@
129 logo
SD9:40 PM ET
NRFI lean
Model 58% (low)Book -120 · 52%
Riley Cornelio
Riley CornelioRHP
No season starts
WSH 1st: 30% (#14) · 28% vs hand
Casey Mize
95% NRFI · 22 GS · 4/5 L5
SD 1st: 25% (#29) · 20% vs hand

Casey Mize has kept the first inning clean in 21 of 22 starts this year — a 95% NRFI rate, including four of his last five — and he's facing a Nationals lineup that plates a first-inning run just 28% of the time against righties. The unknown is Riley Cornelio, who hasn't started yet this season, though San Diego's bats rank 29th in first-inning scoring at 25%. Petco's 94 run factor tilts it further toward quiet.

Petco Park · park run factor 94
  • NRFI lean — Casey Mize has worked a scoreless first in 95% of his starts, the headline edge in a quiet matchup.
  • Books price this NRFI at -120 (52% implied); the model has it 58%.
  • The San Diego Padres score in the first in 25% of games, 29th-most in MLB, 20% against right-handers.
  • The Washington Nationals score in the first in 30% of games, 14th-most in MLB, 28% against right-handers.
125 logo
STL@
130 logo
SF9:45 PM ET
NRFI lean
Model 56%Book -142 · 55%
Quinn Mathews
80% NRFI · 5 GS · 4/5 L5
STL 1st: 30% (#13) · 22% vs hand
Landen Roupp
81% NRFI · 27 GS · 4/5 L5
SF 1st: 27% (#26) · 28% vs hand

Landen Roupp has kept the first inning clean in 81% of his 27 starts, and Quinn Mathews matches him at 80% across a smaller five-start sample — both with four scoreless openers in their last five. Oracle Park's 94 run factor only tightens things further, and San Francisco's bats have plated a first-inning run in just 27% of games. The market's 55% NRFI reading looks fair.

Oracle Park · park run factor 94
  • NRFI lean — Quinn Mathews (80% NRFI) and Landen Roupp (81%) have both buried the first inning, and neither lineup gets going early.
  • Books price this NRFI at -142 (55% implied); the model has it 56%.
  • The San Francisco Giants score in the first in 27% of games, 26th-most in MLB, 28% against left-handers.
  • The St. Louis Cardinals score in the first in 30% of games, 13th-most in MLB, 22% against right-handers.

YRFI Leans

2
111 logo
HOU@
118 logo
PHI6:40 PM ET
YRFI lean
Model 46%Book -102 · 48%
Hayden Wesneski
86% NRFI · 7 GS · 5/5 L5
HOU 1st: 34% (#2) · 36% vs hand
Andrew Painter
63% NRFI · 19 GS · 3/5 L5
PHI 1st: 33% (#5) · 28% vs hand

Andrew Painter has kept the first inning clean in 63% of his 19 starts, but he's drawing a Houston lineup that plates a run in the opening frame 34% of the time — second-most in MLB, and 36% against right-handers. Hayden Wesneski's 86% NRFI mark over seven starts is the counterweight, though that's a small sample in a park playing slightly hitter-friendly at 102. The model's 46% scoreless read tilts YRFI, essentially matching the book's 48%.

Citizens Bank Park · park run factor 102
  • YRFI lean — the Houston Astros push a first-inning run across in 34% of games (2nd-most in MLB), hard to keep off the board early.
  • Books price this NRFI at -102 (48% implied); the model has it 46%.
  • The Philadelphia Phillies score in the first in 33% of games, 5th-most in MLB, 28% against right-handers.
  • The Houston Astros score in the first in 34% of games, 2nd-most in MLB, 36% against right-handers.
109 logo
MIN@
107 logo
DET6:40 PM ET
YRFI lean
Model 46%Book -120 · 51%
Dean Kremer
54% NRFI · 13 GS · 4/5 L5
MIN 1st: 36% (#1) · 38% vs hand
Drew Anderson
100% NRFI · 8 GS · 5/5 L5
DET 1st: 34% (#3) · 35% vs hand

Drew Anderson hasn't allowed a first-inning run in any of his eight starts, which is the strongest NRFI argument on the board — but he draws the Twins, who score in the opening frame 36% of the time, the highest rate in MLB. The other half tilts the other way: Dean Kremer sits at just 54% NRFI, and Detroit's 34% first-inning scoring rate ranks third. That's why the model lands at 46% scoreless, a touch under the book's 51%.

Comerica Park · park run factor 100
  • YRFI lean — the Minnesota Twins push a first-inning run across in 36% of games (most in MLB), hard to keep off the board early.
  • Books price this NRFI at -120 (51% implied); the model has it 46%.
  • The Detroit Tigers score in the first in 34% of games, 3rd-most in MLB, 35% against right-handers.
  • The Minnesota Twins score in the first in 36% of games, the most in MLB, 38% against right-handers.

Coin Flips

9
117 logo
NYM@
116 logo
MIA6:40 PM ET
Coin flip
Model 52%Book -120 · 51%
Sean Manaea
60% NRFI · 15 GS · 3/5 L5
NYM 1st: 29% (#17) · 27% vs hand
Sandy Alcantara
86% NRFI · 29 GS · 5/5 L5
MIA 1st: 28% (#19) · 27% vs hand

Sandy Alcantara has kept the first inning clean in 86% of his 29 starts, including all five of his last five — that alone would push this toward NRFI. The complication is Sean Manaea, who sits at just 60% for the year and has been scoreless in three of five recent outings, and loanDepot park's 102 run factor doesn't help. With the Mets scoring first-inning runs 29% of the time, the model's 52% scoreless read is essentially a coin flip against the book's 51%.

loanDepot park · park run factor 102
  • Coin flip — Sandy Alcantara's 86% NRFI is the case for the under; the New York Mets' 29% first-inning bats (17th-most in MLB) are the case for the over.
  • Books price this NRFI at -120 (51% implied); the model has it 52%.
  • The Miami Marlins score in the first in 28% of games, 19th-most in MLB, 27% against left-handers.
  • The New York Mets score in the first in 29% of games, 17th-most in MLB, 27% against right-handers.
112 logo
LAA@
104 logo
BOS6:45 PM ET
Coin flip
Model 50%Book -135 · 54%
Reid Detmers
78% NRFI · 27 GS · 5/5 L5
LAA 1st: 34% (#4) · 37% vs hand
Patrick Sandoval
80% NRFI · 10 GS · 3/5 L5
BOS 1st: 26% (#27) · 24% vs hand

Reid Detmers has kept the first inning clean in 78% of his 27 starts, including all five of his last five, and Patrick Sandoval counters at 80% across 10 outings — two lefties who rarely stumble out of the gate. The pull the other way comes from the Angels, who score in the first 34% of the time (4th-most in MLB) and 37% against lefties, inside a Fenway park factor of 108. Genuinely 50/50, with the book a touch more NRFI-friendly at 54%.

Fenway Park · park run factor 108
  • Coin flip — Patrick Sandoval's 80% NRFI is the case for the under; the Los Angeles Angels' 34% first-inning bats (4th-most in MLB) are the case for the over.
  • Books price this NRFI at -135 (54% implied); the model has it 50%.
  • The Boston Red Sox score in the first in 26% of games, 27th-most in MLB, 24% against left-handers.
  • The Los Angeles Angels score in the first in 34% of games, 4th-most in MLB, 37% against left-handers.
127 logo
COL@
103 logo
NYY7:05 PM ET
Coin flip
Model 52%Book -120 · 51%
Gabriel Hughes
50% NRFI · 10 GS · 2/5 L5
COL 1st: 32% (#8) · 30% vs hand
Cam Schlittler
86% NRFI · 28 GS · 5/5 L5
NYY 1st: 27% (#23) · 22% vs hand

Cam Schlittler has kept the first inning clean in 86% of his 28 starts, including each of his last five — that's the anchor here. The problem is the other half: Gabriel Hughes sits at a coin-flip 50% NRFI, and Colorado's bats plate a run in the opening frame 32% of the time, eighth-most in MLB. Model at 52% scoreless, book at 51% — no real separation at Yankee Stadium.

Yankee Stadium · park run factor 100
  • Coin flip — Cam Schlittler's 86% NRFI is the case for the under; the Colorado Rockies' 32% first-inning bats (8th-most in MLB) are the case for the over.
  • Books price this NRFI at -120 (51% implied); the model has it 52%.
  • The New York Yankees score in the first in 27% of games, 23rd-most in MLB, 22% against right-handers.
  • The Colorado Rockies score in the first in 32% of games, 8th-most in MLB, 30% against right-handers.
105 logo
TB@
119 logo
ATL7:15 PM ET
Coin flip
Model 49%Book -105 · 48%
Freddy Peralta
67% NRFI · 27 GS · 2/5 L5
TB 1st: 32% (#9) · 31% vs hand
AJ Smith-Shawver
100% NRFI · 4 GS · 4/4 L5
ATL 1st: 30% (#15) · 29% vs hand

AJ Smith-Shawver hasn't allowed a first-inning run in any of his four starts, but four starts is thin evidence to hang much on, and Freddy Peralta has protected the zero in just 2 of his last 5 despite a 67% NRFI mark across 27 outings. Add Tampa Bay scoring in the first 32% of the time — ninth-most in baseball — at a slightly run-friendly Truist Park, and the model's 49% scoreless read sits right on top of the market's 48%.

Truist Park · park run factor 102
  • Coin flip — AJ Smith-Shawver's 100% NRFI is the case for the under; the Tampa Bay Rays' 32% first-inning bats (9th-most in MLB) are the case for the over.
  • Books price this NRFI at -105 (48% implied); the model has it 49%.
  • The Atlanta Braves score in the first in 30% of games, 15th-most in MLB, 29% against right-handers.
  • The Tampa Bay Rays score in the first in 32% of games, 9th-most in MLB, 31% against right-handers.
126 logo
ARI@
108 logo
KC7:40 PM ET
Coin flip
Model 50% (low)Book -107 · 49%
Corbin Burnes
Corbin BurnesRHP
No season starts
ARI 1st: 28% (#20) · 29% vs hand
Michael Wacha
78% NRFI · 27 GS · 3/5 L5
KC 1st: 33% (#6) · 29% vs hand

Michael Wacha's 78% first-inning shutout rate across 27 starts is the sturdiest number on the board, though he's held the zero in just 3 of his last 5. The problem is the other side: Corbin Burnes hasn't thrown a season start yet, so there's no first-inning read on him at all, and Kansas City's bats score in the opening frame 33% of the time — sixth-most in MLB. That blind spot, plus Kauffman's slight run-friendly tilt, keeps this a true 50/50.

Kauffman Stadium · park run factor 102
  • Coin flip — Michael Wacha's 78% NRFI is the case for the under; the Kansas City Royals' 33% first-inning bats (6th-most in MLB) are the case for the over.
  • Books price this NRFI at -107 (49% implied); the model has it 50%.
  • The Kansas City Royals score in the first in 33% of games, 6th-most in MLB, 29% against right-handers.
  • The Arizona Diamondbacks score in the first in 28% of games, 20th-most in MLB, 29% against right-handers.
121 logo
CHC@
123 logo
MIL7:40 PM ET
Coin flip
Model 52%Book -140 · 55%
David Peterson
44% NRFI · 18 GS · 2/5 L5
CHC 1st: 27% (#24) · 26% vs hand
Jacob Misiorowski
84% NRFI · 25 GS · 4/5 L5
MIL 1st: 29% (#16) · 36% vs hand

Jacob Misiorowski has kept the first frame clean in 84% of his 25 starts, and the Cubs have only dented opposing righties in the opening inning 26% of the time — that half of the game screams zeros. The complication is David Peterson, scoreless in the first in just 44% of his 18 outings, facing a Brewers lineup that scores 36% of the time against lefties. American Family Field's 94 run factor keeps it near a true toss-up at 52%.

American Family Field · park run factor 94
  • Coin flip — Jacob Misiorowski's 84% NRFI is the case for the under; the Milwaukee Brewers' 29% first-inning bats (16th-most in MLB) are the case for the over.
  • Books price this NRFI at -140 (55% implied); the model has it 52%.
  • The Milwaukee Brewers score in the first in 29% of games, 16th-most in MLB, 36% against left-handers.
  • The Chicago Cubs score in the first in 27% of games, 24th-most in MLB, 26% against right-handers.
124 logo
PIT@
106 logo
CHW7:40 PM ET
Coin flip
Model 51%Book -129 · 52%
Bubba Chandler
73% NRFI · 26 GS · 3/5 L5
PIT 1st: 31% (#10) · 35% vs hand
Sean Burke
78% NRFI · 23 GS · 5/5 L5
CHW 1st: 32% (#7) · 31% vs hand

Sean Burke has kept the first inning clean in 5 straight starts and 78% of his 23 outings overall, and Bubba Chandler isn't far off at 73% — strong marks on both sides. The catch is that these offenses rank among the league's busiest early, with the White Sox scoring in the first 32% of the time and Pittsburgh at 31% (35% against righties). Slight pitcher edge, essentially a toss-up at Rate Field.

Rate Field · park run factor 98
  • Coin flip — Sean Burke's 78% NRFI is the case for the under; the Chicago White Sox's 32% first-inning bats (7th-most in MLB) are the case for the over.
  • Books price this NRFI at -129 (52% implied); the model has it 51%.
  • The Chicago White Sox score in the first in 32% of games, 7th-most in MLB, 31% against right-handers.
  • The Pittsburgh Pirates score in the first in 31% of games, 10th-most in MLB, 35% against right-handers.
101 logo
TOR@
113 logo
OAK9:40 PM ET
Coin flip
Model 48%Book -6.5 · 10%
Jose Soriano
78% NRFI · 27 GS · 5/5 L5
TOR 1st: 24% (#30) · 26% vs hand
Jack Perkins
54% NRFI · 13 GS · 3/5 L5
OAK 1st: 28% (#18) · 28% vs hand

Jose Soriano has kept the first inning clean in 78% of his 27 starts, including all five of his last five, and he's facing a Toronto-friendly matchup problem in reverse: the Blue Jays themselves score in the opening frame just 24% of the time, dead last in MLB. The tension comes from Sutter Health Park's 117 run factor and Jack Perkins' shakier 54% NRFI rate, which is why the model sits near a 48% coin flip — well above the 10% the market implies.

Sutter Health Park · park run factor 117
  • Coin flip — Jose Soriano's 78% NRFI is the case for the under; the Oakland Athletics' 28% first-inning bats (18th-most in MLB) are the case for the over.
  • Books price this NRFI at -6.5 (10% implied); the model has it 48%.
  • The Oakland Athletics score in the first in 28% of games, 18th-most in MLB, 28% against right-handers.
  • The Toronto Blue Jays score in the first in 24% of games, 30th-most in MLB, 26% against right-handers.
122 logo
CIN@
128 logo
LAD10:10 PM ET
Coin flip
Model 49%Book -121 · 51%
Nick Lodolo
71% NRFI · 17 GS · 2/5 L5
CIN 1st: 28% (#21) · 18% vs hand
Tarik Skubal
65% NRFI · 20 GS · 3/5 L5
LAD 1st: 31% (#12) · 27% vs hand

Lodolo's 71% first-inning shutout rate across 17 starts is the headline number, but he's cleared the frame in just two of his last five, and Skubal's 65% mark comes with a similar wobble at 3-of-5. Both lineups shrink against same-handed pitching — the Dodgers to 27%, the Reds to 18% — yet Dodger Stadium's 102 run factor nudges back the other way. At 49% scoreless versus a 51% market read, there's no real edge either direction.

Dodger Stadium · park run factor 102
  • Coin flip — Nick Lodolo's 71% NRFI is the case for the under; the Los Angeles Dodgers' 31% first-inning bats (12th-most in MLB) are the case for the over.
  • Books price this NRFI at -121 (51% implied); the model has it 49%.
  • The Los Angeles Dodgers score in the first in 31% of games, 12th-most in MLB, 27% against left-handers.
  • The Cincinnati Reds score in the first in 28% of games, 21st-most in MLB, 18% against left-handers.

First-inning results graded from final box scores. Verdicts are informational, not betting advice.

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