Riley O'Brien

P St. Louis Cardinals
Age 32 RHP 6'4" / 180 lbs MLB peak 0.6 · 2027
Overview
MLBRP40-MAN
YearAgeLvl / TeamGGSIPERAFIPK%BB%WARMLE rates
202429MIX2 levels220215.064.2720.4%13.3%0.1K 14.9% · BB 8.7% · FIP 2.94
202530MIX2 levels610672.272.6427.0%9.8%1.5K 25.4% · BB 9.5% · FIP 2.82
202631MLBSTL660644.083.2923.2%9.1%1.0
2027PROJ32MLBSTL630663.943.8925.3%10.1%0.5
2028PROJ95% MLB33MLBSTL540574.084.1724.5%10.5%0.3
2029PROJ90% MLB34MLBSTL480504.324.4723.6%11.0%0.0
Last 3 seasons WAR 2.6  ·  Next 3 projected WAR 0.8Projected rows: MLB playing time only, park and league context applied.
Contract
No contract data on file.
Skills · percentileStatcast 2026
FB Velo90
Whiff%60
K%55
xwOBA vs26
CompsJohn Axford (age 32) · Hirokazu Sawamura (age 33) · Jumbo Diaz (age 32)
2027 FULL-SEASON PROJECTIONrates below = full-season projection
showingPROJ
wRC+ AGAINSTvL 113105vR 97
ERA3.94
FIP3.89
K%25.3%
BB%10.1%
K-BB%15.3%
Proj IP66
Value2027 · WAR
Runs saved vs league avg · 66 IP
K: +4.5 runs (Runs saved by strikeouts vs lg-avg K%)+4KBB: -3.1 runs (Runs saved by walk suppression vs lg-avg BB%)-3BBCONTACT: +0.8 runs (Runs saved on contact quality (HR suppression) vs lg)+1CONTACTSTAM: +3.6 runs (Replacement credit for innings volume)+4STAMTotal WAR: +0.61 (66 IP)+0.6WAR
0.50.30.0272829
Grades · Statcast · Arsenal · Contract
Scouting Grades
STUF5050
CTRL3535
CMD4545
K†6060
Statcast Percentiles
FB Velo
p9097.7
Whiff%
p6026.8%
K%
p5523.2%
xwOBA vs
p260.340
FB+5.8 (58%)
SL+0.8 (41%)
SI (58%)
CH (1%)

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 industry-standard fWAR.

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)
201722ROK MLEPrinceton Rays1110411594017191%3.717.1%13.4%3.7%0.9%2.203.83—
201722ROK RAWPrinceton Rays1110411594017191%3.725.2%10.7%14.5%0.6%2.202.71—
201823MIX MLE2 levels25138835710341452%3.521.7%13.4%8.3%1.5%2.753.77—
201823MIX RAW2 levels25138835710341452%3.528.9%11.5%17.4%1.1%2.752.75—
201924MIX MLE2 levels201710342910744685%5.119.9%11.5%8.4%1.8%3.163.88—
201924MIX RAW2 levels201710342910744685%5.124.9%10.3%14.7%1.4%3.163.06—
202126MIX MLE2 levels2423114499123571896%4.821.7%11.6%10.2%3.3%4.664.54+0.5
202126MIX RAW2 levels2423114499123571896%4.824.6%11.4%13.2%3.6%4.664.49+0.5
202227MIX MLE2 levels34141201483153%1.221.1%16.1%5.0%2.5%6.864.70-0.1
202227MIX RAW2 levels34141201483153%1.223.9%15.4%8.5%2.5%6.864.62-0.0
202328AAA MLETacoma Rainiers51355228863026%1.132.4%11.8%20.6%0.8%2.292.32—
202328AAA RAWTacoma Rainiers51355228863026%1.137.7%13.2%24.6%0.9%2.292.08—
202429MIX MLE2 levels2202198201320%1.014.9%8.7%6.2%0.0%5.062.94+0.4
202429MIX MLE2 levels2202198201320%1.014.9%8.7%6.2%0.0%5.062.94+0.4
202429MIX RAW2 levels2202198201320%1.020.4%13.3%7.1%2.0%5.064.27+0.1
202530MIX MLE2 levels61067285772830%1.125.4%9.5%15.9%1.2%2.272.82+1.4
202530MIX MLE2 levels61067285772830%1.125.4%9.5%15.9%1.2%2.272.82+1.4
202530MIX RAW2 levels61067285772830%1.127.0%9.8%17.2%1.1%2.272.64+1.5
202631MLB MLESt. Louis Cardinals66064276642550%1.023.2%9.1%14.1%1.9%4.083.36+0.9
202631MLB MLESt. Louis Cardinals66064276642550%1.023.2%9.1%14.1%1.9%4.083.36+0.9
202631MLB RAWSt. Louis Cardinals66064276642550%1.023.2%9.1%14.1%1.8%4.083.29+1.0
▸ Career totals (raw MLB only — as recorded)
MLB Career—118112253512357111%1.023.0%10.7%12.3%2.1%3.833.66+1.3
▸ 2027 season — projected remainder (no 2027 stats recorded)
202732MLBSTL63066279712860%1.025.3%10.1%15.3%2.3%3.943.89+0.5
▸ Career projection (2028+) — MLB context, MLB playing time (IP × MLB%)
202833MLB MLESTL58060255632770%1.024.5%10.5%14.0%2.6%4.084.17+0.3
202934MLB MLESTL52055233552670%1.123.6%11.0%12.6%2.9%4.324.47+0.1
202833MLB CTXSTL54057241592560%1.124.5%10.5%14.0%2.6%4.084.17+0.3
202934MLB CTXSTL48050211502360%1.023.6%11.0%12.6%2.9%4.324.47+0.0
▸ Career totals — MLB only (actual + projected)
Career— RAW2201230988232106230%1.023.5%10.7%12.8%2.4%4.003.77+2.1
/ 200 IP— RAW192120086120292200%1.023.5%10.7%12.8%2.4%4.003.77+1.8
Career— MLE3146759425325662964721%1.922.3%11.7%10.7%1.8%3.563.70+1.6
/ 200 IP— MLE106232008521901001621%1.922.3%11.7%10.7%1.8%3.563.70+1.4

Career Comps

Completed MLB careers (no pro action in 2+ yrs) whose totals — actual + projected — most resemble this player's. Pool: 1,474 reliever careers (754 from 1990-2025 + 720 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 PROJECTION1.56123.9%11.0%0.923.99
Fernando Rodriguez Jr. ('16)1.25824.6%11.1%0.934.35
José Cisnero ('24)1.44624.0%11.3%1.014.16
Jose Veras ('14)2.16024.0%12.1%0.963.91
Dave Baldwin ('66-'73, 2 WAR*)1.15622.2%*9.2%*0.96*3.97*
Dave Geisel ('78-'85, 2 WAR*)1.04223.5%*10.6%*0.84*4.12*
Ray Searage ('81-'90, 4 WAR*)1.44121.0%*10.8%*0.84*3.70*