NRFI Results

First-inning leans for August 31, 2026, graded from final box scores.

All-time lean record

255-199

454 graded

56%

hit rate

NRFI

136-11055%

YRFI

119-8957%

0-0 on 5 leans

NRFI 0-0 · YRFI 0-0

NRFI Leans

3
117 logo
NYM@
105 logo
TB6:40 PM ET
NRFI lean
Model 53%Book -109 · 49%
Robert Stock
80% NRFI · 5 GS · 4/5 L5
NYM 1st: 27% (#24) · 28% vs hand
Ian Seymour
82% NRFI · 11 GS · 4/5 L5
TB 1st: 32% (#7) · 32% vs hand

Ian Seymour has kept the first inning clean in 82% of his 11 starts, and Robert Stock matches him at 80% across a smaller five-start sample — that's a tough pair to score against early. Tropicana Field's 95 run factor trims the margins further, though Tampa Bay's bats rank 7th in MLB at scoring in the first (32%), which keeps this from being a runaway. The model's 53% NRFI sits just above the book's 49%.

Tropicana Field · park run factor 95
  • NRFI lean — Robert Stock (80% NRFI) and Ian Seymour (82%) have both buried the first inning, and neither lineup gets going early.
  • Books price this NRFI at -109 (49% implied); the model has it 53%.
  • The Tampa Bay Rays score in the first in 32% of games, 7th-most in MLB, 32% against right-handers.
  • The New York Mets score in the first in 27% of games, 24th-most in MLB, 28% against left-handers.
129 logo
SD@
122 logo
CIN6:40 PM ET
NRFI lean
Model 54%Book -106 · 48%
Michael King
88% NRFI · 25 GS · 5/5 L5
SD 1st: 23% (#30) · 19% vs hand
Brady Singer
54% NRFI · 24 GS · 3/5 L5
CIN 1st: 26% (#25) · 28% vs hand

Michael King has kept the first inning clean in 88% of his 25 starts, including all five of his last five, and he's facing a Reds offense that plates a first-inning run just 26% of the time. Brady Singer's 54% NRFI mark is the soft spot, but San Diego's bats rank 30th at scoring early and manage it only 19% against righties. Great American's 106 park factor is the main counterweight.

Great American Ball Park · park run factor 106
  • NRFI lean — Michael King has worked a scoreless first in 88% of his starts, the headline edge in a quiet matchup.
  • Books price this NRFI at -106 (48% implied); the model has it 54%.
  • The Cincinnati Reds score in the first in 26% of games, 25th-most in MLB, 28% against right-handers.
  • The San Diego Padres score in the first in 23% of games, 30th-most in MLB, 19% against right-handers.
123 logo
MIL@
121 logo
CHC7:40 PM ET
NRFI lean
Model 57%Book +1.5 · 64%
Kyle Harrison
85% NRFI · 20 GS · 4/5 L5
MIL 1st: 29% (#17) · 28% vs hand
Clay Holmes
83% NRFI · 12 GS · 4/5 L5
CHC 1st: 27% (#22) · 27% vs hand

Kyle Harrison has kept the first inning clean in 85% of his 20 starts, and Clay Holmes isn't far behind at 83% over 12 — a pairing that fits Wrigley's 94 run factor. Neither offense does much early either, with the Cubs scoring in the first just 27% of the time and Milwaukee at 29%. The model still lands at 57%, a bit shy of the book's 64% implied NRFI.

Wrigley Field · park run factor 94
  • NRFI lean — Kyle Harrison (85% NRFI) and Clay Holmes (83%) have both buried the first inning, and neither lineup gets going early.
  • Books price this NRFI at +1.5 (64% implied); the model has it 57%.
  • The Chicago Cubs score in the first in 27% of games, 22nd-most in MLB, 27% against left-handers.
  • The Milwaukee Brewers score in the first in 29% of games, 17th-most in MLB, 28% against right-handers.

YRFI Leans

2
107 logo
DET@
109 logo
MIN7:40 PM ET
YRFI lean
Model 42%Book -123.5 · 95%
Jackson Jobe
50% NRFI · 4 GS · 2/4 L5
DET 1st: 32% (#4) · 33% vs hand
Taj Bradley
56% NRFI · 25 GS · 2/5 L5
MIN 1st: 36% (#1) · 37% vs hand

Minnesota puts a run on the board in the first 36% of the time — the highest rate in MLB — and Detroit isn't far behind at 32%, fourth-best. Neither starter has shut the door reliably either: Jackson Jobe has held the first scoreless in just half his four starts, while Taj Bradley sits at 56% across 25. Target Field's 104 run factor adds to the YRFI lean, and the model's 42% scoreless mark is worlds away from the book's implied 95%.

Target Field · park run factor 104
  • 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 -123.5 (95% implied); the model has it 42%.
  • The Minnesota Twins score in the first in 36% of games, the most in MLB, 37% against right-handers.
  • The Detroit Tigers score in the first in 32% of games, 4th-most in MLB, 33% against right-handers.
102 logo
BAL@
127 logo
COL8:40 PM ET
YRFI lean
Book +110 · 45%
TBD
Starter TBD
Awaiting probable starter
Tanner Gordon
71% NRFI · 7 GS · 4/5 L5
COL 1st: 32% (#8)
Coors Field · park run factor 128
  • YRFI lean — Coors Field (run factor 128) is one of the league's most hitter-friendly parks, and the Colorado Rockies score early in 32% of games.
  • Books price this NRFI at +110 (45% implied).
  • The Colorado Rockies score in the first in 32% of games, 8th-most in MLB.
  • The Baltimore Orioles score in the first in 26% of games, 26th-most in MLB, 31% against right-handers.

Coin Flips

7
130 logo
SF@
119 logo
ATL6:05 PM ET
Coin flip
Model 53% (low)Book -4 · 7%
Anthony Molina
Anthony MolinaRHP
No season starts
SF 1st: 26% (#27) · 21% vs hand
Bryce Elder
79% NRFI · 24 GS · 4/5 L5
ATL 1st: 30% (#14) · 30% vs hand

Bryce Elder has kept the first inning clean in 79% of his 24 starts, including four of his last five, and the Giants have been a quiet early bunch — scoring in the opening frame just 26% of the time, 21% against right-handers. The wild card is Anthony Molina, who has no season starts to lean on, so there's no read on how he handles an Atlanta lineup that plates a run in the 1st 30% of the time at slightly hitter-friendly Truist Park. The model sits near 53% scoreless, but that thin sample keeps confidence low despite the wide gap from the market's 7%.

Truist Park · park run factor 102
  • Coin flip — Bryce Elder's 79% NRFI is the case for the under; the Atlanta Braves' 30% first-inning bats (14th-most in MLB) are the case for the over.
  • Books price this NRFI at -4 (7% implied); the model has it 53%.
  • The Atlanta Braves score in the first in 30% of games, 14th-most in MLB, 30% against right-handers.
  • The San Francisco Giants score in the first in 26% of games, 27th-most in MLB, 21% against right-handers.
116 logo
MIA@
120 logo
WSH6:45 PM ET
Coin flip
Model 50% (low)Book -115 · 50%
Ryan Gusto
77% NRFI · 13 GS · 4/5 L5
MIA 1st: 29% (#19) · 24% vs hand
Will Dion
Will DionLHP
No season starts
WSH 1st: 31% (#10) · 30% vs hand

Ryan Gusto has kept the first inning clean in 77% of his 13 starts, including four of his last five — that's the sturdiest number on the board here. The problem is the other half of the equation: Will Dion has no starts on the season, so there's nothing to lean on against a Marlins group that scores in the first 29% of the time. With Nationals Park playing slightly above average for runs, 50/50 feels honest.

Nationals Park · park run factor 102
  • Coin flip — Ryan Gusto's 77% NRFI is the case for the under; the Washington Nationals' 31% first-inning bats (10th-most in MLB) are the case for the over.
  • Books price this NRFI at -115 (50% implied); the model has it 50%.
  • The Washington Nationals score in the first in 31% of games, 10th-most in MLB, 30% against right-handers.
  • The Miami Marlins score in the first in 29% of games, 19th-most in MLB, 24% against left-handers.
114 logo
SEA@
104 logo
BOS6:45 PM ET
Coin flip
Model 50%Book -142 · 55%
George Kirby
67% NRFI · 24 GS · 3/5 L5
SEA 1st: 30% (#15) · 29% vs hand
Payton Tolle
73% NRFI · 22 GS · 5/5 L5
BOS 1st: 25% (#28) · 22% vs hand

Payton Tolle has kept the first inning clean in all five of his last starts, and his 73% NRFI mark over 22 outings pairs with George Kirby's 67% for Seattle — two arms that rarely stumble early. The counterweight is Fenway, where the 108 run factor gives even quiet offenses room to work, and Boston's bats have only dented the first inning 25% of the time. The model lands at 50%, a shade under the book's implied 55%.

Fenway Park · park run factor 108
  • Coin flip — Payton Tolle's 73% NRFI is the case for the under; the Seattle Mariners' 30% first-inning bats (15th-most in MLB) are the case for the over.
  • Books price this NRFI at -142 (55% implied); the model has it 50%.
  • The Boston Red Sox score in the first in 25% of games, 28th-most in MLB, 22% against right-handers.
  • The Seattle Mariners score in the first in 30% of games, 15th-most in MLB, 29% against left-handers.
113 logo
OAK@
115 logo
TEX8:05 PM ET
Coin flip
Model 51%Book -155 · 57%
Gage Jump
71% NRFI · 17 GS · 2/5 L5
OAK 1st: 29% (#18) · 29% vs hand
Jacob deGrom
56% NRFI · 25 GS · 3/5 L5
TEX 1st: 28% (#20) · 21% vs hand

Gage Jump has kept the first inning clean in 71% of his 17 starts, and Texas has been especially quiet against left-handers, plating a first-inning run just 21% of the time. The counterweight is Jacob deGrom's own 56% NRFI mark — solid, not overwhelming — with the A's scoring in the opening frame 29% of the time. The model lands at 51% scoreless, a touch below the book's implied 57%.

Globe Life Field · park run factor 94
  • Coin flip — Gage Jump's 71% NRFI is the case for the under; the Oakland Athletics' 29% first-inning bats (18th-most in MLB) are the case for the over.
  • Books price this NRFI at -155 (57% implied); the model has it 51%.
  • The Texas Rangers score in the first in 28% of games, 20th-most in MLB, 21% against left-handers.
  • The Oakland Athletics score in the first in 29% of games, 18th-most in MLB, 29% against right-handers.
106 logo
CHW@
111 logo
HOU8:10 PM ET
Coin flip
Model 47%Book -111 · 49%
Anthony Kay
71% NRFI · 24 GS · 4/5 L5
CHW 1st: 32% (#6) · 30% vs hand
Peter Lambert
70% NRFI · 23 GS · 1/5 L5
HOU 1st: 35% (#3) · 26% vs hand

Anthony Kay and Peter Lambert have each held the first inning scoreless in roughly 70% of their starts, which normally points one direction — except Houston (35%, third-most in MLB) and Chicago (32%, sixth-most) both rank near the top in first-inning scoring. Recent form splits too: Kay is 4-for-5 in his last five, Lambert just 1-for-5. The model's 47% sits right beside the market's 49%.

Daikin Park · park run factor 100
  • Coin flip — Anthony Kay's 71% NRFI is the case for the under; the Houston Astros' 35% first-inning bats (3rd-most in MLB) are the case for the over.
  • Books price this NRFI at -111 (49% implied); the model has it 47%.
  • The Houston Astros score in the first in 35% of games, 3rd-most in MLB, 26% against left-handers.
  • The Chicago White Sox score in the first in 32% of games, 6th-most in MLB, 30% against right-handers.
103 logo
NYY@
112 logo
LAA9:38 PM ET
Coin flip
Model 50%Book -120 · 51%
Elmer Rodriguez
60% NRFI · 5 GS · 3/5 L5
NYY 1st: 28% (#21) · 21% vs hand
Walbert Urena
91% NRFI · 22 GS · 5/5 L5
LAA 1st: 36% (#2) · 36% vs hand

Walbert Urena has kept the first inning clean in 91% of his 22 starts, including each of his last five — that's about as strong a NRFI signal as this page offers. The problem is the other half of the equation: Elmer Rodriguez sits at 60% through five starts, and the Angels put up a first-inning run in 36% of their games, second-most in MLB. Model and market both land near 50%, so it's a genuine toss-up at Angel Stadium.

Angel Stadium · park run factor 102
  • Coin flip — Walbert Urena's 91% NRFI is the case for the under; the Los Angeles Angels' 36% first-inning bats (2nd-most in MLB) are the case for the over.
  • Books price this NRFI at -120 (51% implied); the model has it 50%.
  • The Los Angeles Angels score in the first in 36% of games, 2nd-most in MLB, 36% against right-handers.
  • The New York Yankees score in the first in 28% of games, 21st-most in MLB, 21% against right-handers.
118 logo
PHI@
126 logo
ARI9:40 PM ET
Coin flip
Model 49%Book -114 · 50%
Aaron Nola
73% NRFI · 26 GS · 3/5 L5
PHI 1st: 32% (#5) · 28% vs hand
Brandon Pfaadt
79% NRFI · 14 GS · 4/5 L5
ARI 1st: 30% (#16) · 30% vs hand
Chase Field · park run factor 106
  • Coin flip — Brandon Pfaadt's 79% NRFI is the case for the under; the Philadelphia Phillies' 32% first-inning bats (5th-most in MLB) are the case for the over.
  • Books price this NRFI at -114 (50% implied); the model has it 49%.
  • The Arizona Diamondbacks score in the first in 30% of games, 16th-most in MLB, 30% against right-handers.
  • The Philadelphia Phillies score in the first in 32% of games, 5th-most in MLB, 28% against right-handers.

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

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