Peyton Stumbo

P Altoona Curve
Age 25 RHP 6'1" / 200 lbs AA peak 0.3 · 2028
Overview
AAPROSPECT
ETA2028MLB%2%
YearAgeLvl / TeamGGSIPERAFIPK%BB%WARMLE rates
202422APIT373684.923.9325.7%8.8%—K 19.0% · BB 10.4% · FIP 5.11
202523MIX2 levels2521904.303.2121.2%7.1%—K 16.0% · BB 8.2% · FIP 4.10
202624AAPIT27261216.234.8718.9%8.4%—K 15.3% · BB 9.2% · FIP 5.55
2027PROJ25MLBPIT1125.435.4313.9%9.0%-0.0
2028PROJ44% MLB26MLBPIT66375.275.2415.5%8.8%0.1
2029PROJ63% MLB27MLBPIT88485.205.2016.0%8.8%0.1
Next 3 projected WAR 0.2Projected rows: MLB playing time only, park and league context applied.
Contract
No contract data on file.
Scouting grades · 20-80
Stuff35Control60Command45
Career WAR0.0 WAR median (P10 -0.4 / P90 1.1, comp-based) · star 0% · didn't stick 92%
CompsHunter Adkins (age 25) · Bryce Morrow (age 27) · Alfonso Sanchez (age 27)
2027 FULL-SEASON PROJECTIONrates below = full-season projection
showingPROJ
wRC+ AGAINSTvL 136128vR 120
ERA5.43
FIP5.43
K%13.9%
BB%9.0%
K-BB%5.0%
Proj IP75
Value2027 · WAR
Runs saved vs league avg · 75 IP
K: -5.2 runs (Runs saved by strikeouts vs lg-avg K%)-5KBB: -0.3 runs (Runs saved by walk suppression vs lg-avg BB%)-0BBCONTACT: -4.9 runs (Runs saved on contact quality (HR suppression) vs lg)-5CONTACTSTAM: +5.7 runs (Replacement credit for innings volume)+6STAMTotal WAR: -0.49 (75 IP)-0.5WAR
0.00.10.10.10.0-0.127283032
Grades · Contract
Scouting Grades
STUF3535
CTRL6060
CMD4545
K†3040

Contract

No contract data on file. Pre-MLB players and minor-league free agents do not yet have salary projections — entries are added at first 40-man roster placement.

Career Stats + Projections

Real MLB stats plus park-adjusted projections — this season (so far / rest / full), then future seasons and career totals.
basis chips: RAW = as recorded · CTX = with park/league context · A+C = actual + context combined · MLE = level/park-neutral
Methodology▸ how WAR & MLE are computed

Stats are park-neutral MLB equivalents. The "TEAM" column shows current org affiliation only — we do NOT project at that team's park.
Rates (K%, BB%, HR-BF) are park-stripped; MiLB stat lines are translated to their MLB-equivalent via per-level MLE factors.
WAR is computed from projected runs prevented vs a replacement pitcher (the marginal arm a team would call up if this pitcher were unavailable) — calibrated to the standard WAR scale.

YearAge LvlTeam GGSIPBF KBBHR GS%IP/G K%BB%K-BB%HR% ERAFIP WAR
▸ Career — actual stats, one row per year (as recorded, no adjustments)
▸ Career — adjusted (each season translated to a park/league-neutral MLB-equivalent line; levels combined per year)
▸ Model inputs — neutral MLE (past 3 seasons + 2027 so far)
202321ROK MLEFCL Pirates506233000%1.313.0%0.0%13.0%0.0%1.422.00—
202321ROK RAWFCL Pirates506233000%1.313.0%0.0%13.0%0.0%1.422.15—
202422A MLEBradenton Marauders373682967626108%1.819.0%10.4%8.6%4.2%4.925.11—
202422A MLEBradenton Marauders373682967626108%1.819.0%10.4%8.6%4.2%4.925.11—
202422A RAWBradenton Marauders373682967626108%1.825.7%8.8%16.9%3.4%4.923.93—
202523MIX MLE2 levels2521903828127784%3.616.0%8.2%7.8%2.4%4.304.10—
202523MIX MLE2 levels2521903828127784%3.616.0%8.2%7.8%2.4%4.304.10—
202523MIX RAW2 levels2521903828127784%3.621.2%7.1%14.1%1.8%4.303.21—
202624AA MLEAltoona Curve2726121562106472296%4.515.3%9.2%6.1%4.7%6.235.55—
202624AA MLEAltoona Curve2726121562106472296%4.515.3%9.2%6.1%4.7%6.235.55—
202624AA RAWAltoona Curve2726121562106472296%4.518.9%8.4%10.5%3.9%6.234.87—
▸ 2027 season — projected remainder (no 2027 stats recorded)
202725MLBPIT1128110100%2.013.9%9.0%5.0%3.6%5.435.43-0.0
▸ Career projection (2028+) — MLB context, MLB playing time (IP × MLB%)
202826MLB MLEPIT141485359563213100%6.115.5%8.8%6.7%3.6%5.275.24+0.2
202927MLB MLEPIT131375318512811100%5.816.0%8.8%7.2%3.6%5.205.20+0.2
203028MLB MLEPIT121270294482611100%5.816.2%8.9%7.3%3.6%5.205.24+0.1
203129MLB MLEPIT111164271442510100%5.816.1%9.1%7.0%3.8%5.285.34+0.0
203230MLB MLEPIT101058245392310100%5.815.7%9.4%6.3%4.0%5.425.52-0.1
202826MLB CTXPIT663715624146100%6.215.5%8.8%6.7%3.6%5.275.24+0.1
202927MLB CTXPIT884820332187100%6.016.0%8.8%7.2%3.6%5.205.20+0.1
203028MLB CTXPIT995322436208100%5.916.2%8.9%7.3%3.6%5.205.24+0.1
203129MLB CTXPIT995222035208100%5.816.1%9.1%7.0%3.8%5.285.34+0.0
203230MLB CTXPIT885021133208100%6.215.7%9.4%6.3%4.0%5.425.52-0.1
▸ Career totals — MLB only (actual + projected)
Career— RAW404024010141619138100%6.015.9%9.0%6.9%3.7%5.274.93+1.3
/ 200 IP— RAW33332008441347632100%6.015.9%9.0%6.9%3.7%5.274.93+1.1
Career— MLE945028512632061144853%3.016.3%9.0%7.3%3.8%5.204.95+0.4
/ 200 IP— MLE6635200885144803453%3.016.3%9.0%7.3%3.8%5.204.95+0.2

How the minor-league lines were translated

One row per minor-league stint. Open a row to see each step: the raw rate, the park adjustment, the league/level factor, the age adjustment (hitters) and the resulting MLE rate. Factors are the same ones listed on the MLE Factors page.

2026 AAAltoona Curve · 121 IPFIP 4.72 → 5.55 (+0.84)K% 18.9% → 15.3%
ComponentRawPark ÷Level factor ×= MLE
K% /BF18.86%—×0.81015.28%
BB% (unintentional) /BF8.36%—×1.1009.20%
HR / BF /BF3.91%÷1.000×1.2004.70%

Factors used: pitcher AA level factors — K ×0.81, BB ×1.10, HR ×1.20. Pitcher translation is level-wide (no per-league rows, no age adjustment); HR/BF is park-adjusted at half strength (park HR factor 100).

Result: FIP 4.72 → 5.55, computed from the rates in the table with the same formula before and after. The MLE line is not regressed to the mean — regression is applied when seasons are blended into a projection (how).

2025 ABradenton Marauders · 49 IPFIP 2.78 → 3.76 (+0.99)K% 22.0% → 16.3%
ComponentRawPark ÷Level factor ×= MLE
K% /BF22.01%—×0.74016.29%
BB% (unintentional) /BF3.83%—×1.1804.52%
HR / BF /BF1.91%÷0.932×1.3002.67%

Factors used: pitcher A level factors — K ×0.74, BB ×1.18, HR ×1.30. Pitcher translation is level-wide (no per-league rows, no age adjustment); HR/BF is park-adjusted at half strength (park HR factor 86).

Result: FIP 2.78 → 3.76, computed from the rates in the table with the same formula before and after. The MLE line is not regressed to the mean — regression is applied when seasons are blended into a projection (how).

2025 A+Greensboro Grasshoppers · 41 IPFIP 3.73 → 4.52 (+0.78)K% 20.2% → 15.6%
ComponentRawPark ÷Level factor ×= MLE
K% /BF20.23%—×0.77015.58%
BB% (unintentional) /BF10.98%—×1.15012.63%
HR / BF /BF1.73%÷1.048×1.2502.07%

Factors used: pitcher A+ level factors — K ×0.77, BB ×1.15, HR ×1.25. Pitcher translation is level-wide (no per-league rows, no age adjustment); HR/BF is park-adjusted at half strength (park HR factor 110).

Result: FIP 3.73 → 4.52, computed from the rates in the table with the same formula before and after. The MLE line is not regressed to the mean — regression is applied when seasons are blended into a projection (how).

2024 ABradenton Marauders · 68 IPFIP 3.90 → 5.11 (+1.22)K% 25.7% → 19.0%
ComponentRawPark ÷Level factor ×= MLE
K% /BF25.68%—×0.74019.00%
BB% (unintentional) /BF8.78%—×1.18010.36%
HR / BF /BF3.38%÷1.046×1.3004.20%

Factors used: pitcher A level factors — K ×0.74, BB ×1.18, HR ×1.30. Pitcher translation is level-wide (no per-league rows, no age adjustment); HR/BF is park-adjusted at half strength (park HR factor 109).

Result: FIP 3.90 → 5.11, computed from the rates in the table with the same formula before and after. The MLE line is not regressed to the mean — regression is applied when seasons are blended into a projection (how).

2023 ROKFCL Pirates · 6 IPFIP 2.00 → 2.35 (+0.35)K% 13.0% → 8.9%
ComponentRawPark ÷Level factor ×= MLE
K% /BF13.04%—×0.6808.87%
BB% (unintentional) /BF0.00%—×1.2500.00%
HR / BF /BF0.00%÷0.925×1.4000.00%

Factors used: pitcher ROK level factors — K ×0.68, BB ×1.25, HR ×1.40. Pitcher translation is level-wide (no per-league rows, no age adjustment); HR/BF is park-adjusted at half strength (park HR factor 85).

Result: FIP 2.00 → 2.35, computed from the rates in the table with the same formula before and after. The MLE line is not regressed to the mean — regression is applied when seasons are blended into a projection (how).

Career Comps

Completed MLB careers (no pro action in 2+ yrs) whose totals — actual + projected — most resemble this player's. Pool: 1,234 reliever careers (754 from 1990-2025 + 480 historical, 1901-2023), also matched on career-to-date at the same age. * Historical (Lahman) careers: rates era-adjusted to 2001-24 league levels; WAR is an OGILVIE proxy.

Player162sIP/yrK%BB%HR/9ERA
OGILVIE CAREER PROJECTION2.17115.5%9.0%1.425.30
Jose Cabrera ('02)1.46816.2%7.9%1.394.95
Lance Painter ('03)2.25616.7%9.0%1.325.24
Mike Lincoln ('10)1.95414.1%8.9%1.325.33
Chuck Hartenstein ('66-'77, -1 WAR*)1.55913.7%*7.2%*1.50*5.28*
Randy St. Claire ('84-'94, -0 WAR*)1.35019.0%*8.4%*1.39*4.61*
Scott Bailes ('86-'98, -3 WAR*)3.47615.4%*8.2%*1.35*5.02*