Dynasty
Nastiest GIFs
The List
Dynasty
Nastiest GIFs
The List

Riley O'Brien

#61 - Relief Pitcher

St. Louis Cardinals

Bats / Throws Right / Right
Date of Birth 2/6/1995 (31)
Height, Weight 6'4", 180 lb
Hometown Seattle, WA

2026 Season Stats

MLB Rank MLB Average
Sv IP ERA WHIP K% BB%
26 41.2 3.67 1.22 24.4% 9.4%
2nd 2
Sv
112th 35.0
IP
147th 4.28
ERA
100th 1.35
WHIP
150th 22.4%
K%
135th 9.9%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
98.1 12.0% 28.5% 50.6% 4.0% 4.78 4.07
18th 94.5
FB MPH
195th 12.1%
SwStr%
178th 28.5%
CSW%
192nd 50.9%
Str-ICR
130th 4.6%
MTK%
284th 4.94
PLV
250th 3.52
PLA
Saves List
Rank
18th
Saves+Holds List
Rank
64th

Articles

7/22/2026Fantasy Reliever Rankings: Closers, Holds & SOLDs - 7/21Rick Graham

7/21/2026Fantasy Baseball Relief Pitcher Roundup: 7/20Rick Graham

7/18/2026Fantasy Baseball Relief Pitcher Roundup: 7/17Rick Graham

7/15/2026Fantasy Reliever Rankings: Closers, Holds & SOLDs - 7/14Rick Graham

7/12/2026Fantasy Baseball Relief Pitcher Roundup: 7/11Rick Graham

See More Articles
PL Pro logo Get PL Pro

Exclusive Access to:

Weekly Player Rater | Live Draft Assistant Tool
2026 Season Projections | Ad-Free Website

book icon Stats Glossary

Riley O’Brien Overview

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team G GS IP W-L Sv Hld ERA WHIP xERA FIP xFIP PLA K% BB% H/9 HR/9 BABIP HR/FB% LOB% ICR% GB% SwStr% CSW% IPR% PLV
2021 CIN 1 1 1.1 0-1 0 0 13.50 3.75 16.76 31.35 10.16 12.60 22.2% 33.3% 13.5 13.50 .000 200.0% 100.0% 50.0% 50.0% 16.7% 26.2% 0.38 4.08
2022 SEA 1 0 1.0 0-0 0 0 0.00 2.00 1.43 4.11 4.11 6.32 20.0% 20.0% 9.0 0.00 .333 - 100.0% - 100.0% 8.7% 21.7% 0.39 4.63
2024 STL 8 0 8.0 0-0 0 0 11.25 2.63 6.56 7.04 5.58 6.39 23.9% 17.4% 14.6 2.25 .458 33.3% 62.5% 46.2% 38.5% 10.8% 26.8% 0.38 4.67
2025 STL 42 0 48.0 3-1 6 6 2.06 1.15 3.44 3.61 4.04 3.31 22.6% 11.1% 6.2 0.38 .254 10.5% 82.8% 33.6% 56.1% 11.1% 28.0% 0.47 4.93
2026 STL 42 0 41.2 3-4 26 1 3.67 1.22 4.68 3.49 4.17 4.07 24.4% 9.4% 7.3 0.43 .302 9.1% 71.7% 32.7% 55.0% 12.0% 28.5% 0.47 4.78
RP MLB Percentile 81 0 66 68-8 99 27 58 71 30 73 55 28 56 60 61 86 40 83 40 79 87 44 48 37 17
RP MLB AVG 27 1 35.0 2-2 2 5 4.28 1.35 4.31 4.33 4.37 3.52 22.4% 9.9% 8.3 1.16 .289 18.4% 72.6% 37.1% 43.6% 12.1% 28.5% 0.50 4.94
Career 94 1 100.0 6-6 32 7 3.60 1.34 4.36 4.14 4.28 4.03 23.5% 11.6% 7.5 0.72 .292 16.7% 76.5% 34.3% 54.3% 11.5% 27.9% 0.46 4.82

Riley O’Brien Repertoire

2021 2022 2024 2025 2026 All
Hide MLB Percentile | Hide MLB Average

Riley O’Brien Game Log

Riley O’Brien Standard

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team G GS IP W-L QS Sv Hld P Strikes Balls TBF H 1B 2B 3B HR K BB HB WP
2021 CIN 1 1 1.1 0-1 0 0 0 42 22 20 9 2 0 0 0 2 2 3 0 0
2022 SEA 1 0 1.0 0-0 0 0 0 23 14 9 5 1 1 0 0 0 1 1 0 0
2024 STL 8 0 8.0 0-0 0 0 0 194 108 86 46 13 8 2 1 2 11 8 1 1
2025 STL 42 0 48.0 3-1 0 6 6 758 470 289 199 33 25 5 1 2 45 22 7 3
2026 STL 42 0 41.2 3-4 0 26 1 694 423 271 180 34 26 6 0 2 44 17 9 5
RP MLB Percentile 81 0 66 68-8 0 99 27 68 63 24 70 35 23 35 39 69 69 37 0 2
RP MLB AVG 27 1 35.0 2-2 0 2 5 591 377 215 152 32 21 6 1 4 34 14 2 1
Career 94 1 100.0 6-6 0 32 7 1,711 1,037 675 439 83 60 13 2 8 103 51 17 9

Riley O’Brien Advanced

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team K% BB% AVG SLG OPS wOBA BABIP BACON xAVG xwOBA xBABIP xwoBACON EV FB EV LA xERA
2021 CIN 22.2% 33.3% .333 1.333 1.889 .677 .000 .500 .337 .626 .237 .890 88.9 106.4 -9.5 16.76
2022 SEA 20.0% 20.0% .250 .250 .650 .315 .333 .333 .069 .187 .092 .082 98.5 - -23.0 1.43
2024 STL 23.9% 17.4% .361 .639 1.117 .467 .458 .500 .283 .397 .342 .463 89.0 92.1 17.7 6.56
2025 STL 22.6% 11.1% .196 .274 .587 .270 .254 .266 .226 .289 .300 .302 84.6 85.0 5.1 3.44
2026 STL 24.4% 9.4% .225 .305 .642 .297 .302 .315 .243 .337 .306 .381 86.8 89.6 1.6 4.68
RP MLB Percentile 56 60 59 80 71 65 40 56 35 30 23 32 66 45 97 30
RP MLB AVG 22.4% 9.9% .241 .393 .717 .316 .289 .320 .237 .319 .281 .362 87.7 89.3 13.3 4.31
Career 23.5% 11.6% .227 .340 .686 .313 .292 .313 .239 .328 .303 .359 86.2 88.5 4.4 4.36

Riley O’Brien Pitch › Mix

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team FF% (MPH) SI% (MPH) FC% (MPH) SL% (MPH) ST% (MPH) CB% (MPH) CH% (MPH) FS% (MPH) KN% (MPH) Fastball% Secondary%
2021 CIN54.8% (91.9)----23.8% (79.1)21.4% (88.1)-- 54.8% 45.2%
2022 SEA47.8% (92.4)----47.8% (78.0)--- 47.8% 47.8%
2024 STL2.1% (96.1)45.9% (96.8)-26.3% (89.7)0.5% (84.7)25.3% (82.6)--- 47.9% 52.1%
2025 STL-48.3% (98.0)-30.5% (90.0)3.6% (83.1)17.6% (83.4)0.1% (90.4)-- 48.3% 51.7%
2026 STL-60.2% (98.1)-8.9% (91.1)29.8% (83.5)-1.0% (90.9)-- 60.2% 39.8%
RP MLB Percentile - 95 (95) - 14 (97) 76 (62) - 1 (92) - - 82.6% 17.1%
RP MLB AVG 38.1% (94.5) 25.8% (94.0) 20.7% (89.4) 25.4% (85.4) 21.5% (82.5) 16.2% (79.9) 17.3% (86.3) 18.6% (86.3) 32.3% (68.2) 48.3% 51.5%
Career2.2% (92.5)51.0% (97.9)-20.1% (90.2)13.7% (83.4)11.9% (82.7)1.0% (89.4)-- 53.2% 46.7%

Riley O’Brien Pitch › Results

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team FF CSW% SI CSW% FC CSW% SL CSW% ST CSW% CB CSW% CH CSW% FS CSW% KN CSW% Fastball CSW% Secondary CSW%
2021 CIN21.7% (1)----40.0% (4)22.2% (2)-- 21.7% 31.6%
2022 SEA18.2% (0)----18.2% (1)--- 18.2% 18.2%
2024 STL25.0% (1)24.7% (5)-31.4% (7)100.0% (1)24.5% (7)--- 24.7% 28.7%
2025 STL-24.0% (18)-31.6% (32)33.3% (5)31.6% (29)0.0% (0)-- 24.0% 31.6%
2026 STL-29.9% (36)-24.2% (7)27.1% (38)-28.6% (2)-- 29.9% 26.4%
RP MLB Percentile - 65 (3) - 22 (58) 42 (8) - 77 (70) - - 69.1% 28.3%
RP MLB AVG 27.0% (21) 27.1% (8) 27.0% (10) 29.1% (17) 28.1% (14) 27.4% (10) 21.8% (13) 23.8% (15) 23.8% (8) 27.8% 28.8%
Career21.1% (2)26.9% (59)-30.2% (46)28.1% (44)29.6% (41)23.5% (4)-- 26.7% 29.3%

Riley O’Brien Batted Ball › Contact

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team GB% LD% FB% PU% SS% Pull% Cent% Oppo% Foul Str% PC% Fl&B% Solid% Brl% ICR%
2021 CIN 50.0% 25.0% 25.0% 0.0% 50.0% 75.0% 25.0% 0.0% 16.7% 50.0% 0.0% 0.0% 50.0% 50.0%
2022 SEA 100.0% 0.0% 0.0% 0.0% 0.0% 33.3% 33.3% 33.3% 26.1% 100.0% 0.0% 0.0% 0.0% -
2024 STL 38.5% 23.1% 23.1% 15.4% 46.2% 53.8% 34.6% 11.5% 15.5% 53.8% 34.6% 3.8% 7.7% 46.2%
2025 STL 56.1% 21.1% 15.4% 7.3% 30.1% 43.2% 26.4% 30.4% 17.5% 65.9% 26.8% 4.1% 3.3% 33.6%
2026 STL 55.0% 22.0% 20.2% 2.8% 30.3% 39.1% 38.2% 22.7% 16.6% 67.0% 21.1% 5.5% 6.4% 32.7%
RP MLB Percentile 87 46 23 4 75 37 80 27 24 79 75 49 55 79
RP MLB AVG 43.6% 21.7% 24.4% 10.3% 34.6% 41.0% 33.9% 25.1% 18.0% 62.6% 24.5% 5.8% 7.1% 37.1%
Career 54.3% 21.5% 18.1% 6.0% 31.7% 42.9% 32.1% 25.0% 17.0% 65.3% 24.5% 4.5% 5.7% 34.3%

Riley O’Brien Batted Ball › Outcomes

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team AVG wOBA BABIP BACON xAVG xwOBA xBABIP xwoBACON EV FB EV LA HR/FB ICR% IPA%
2021 CIN .333 .677 .000 .500 .337 .626 .237 .890 88.9 106.4 -9.5 200.0% 50.0% 22.2%
2022 SEA .250 .315 .333 .333 .069 .187 .092 .082 98.5 - -23.0 - - -
2024 STL .361 .467 .458 .500 .283 .397 .342 .463 89.0 92.1 17.7 33.3% 46.2% 26.1%
2025 STL .196 .270 .254 .266 .226 .289 .300 .302 84.6 85.0 5.1 10.5% 33.6% 21.1%
2026 STL .225 .297 .302 .315 .243 .337 .306 .381 86.8 89.6 1.6 9.1% 32.7% 20.0%
RP MLB Percentile 59 65 40 56 35 30 23 32 66 45 97 83 79 82
RP MLB AVG .241 .316 .289 .320 .237 .319 .281 .362 87.7 89.3 13.3 18.4% 37.1% 24.6%
Career .227 .313 .292 .313 .239 .328 .303 .359 86.2 88.5 4.4 16.7% 34.3% 21.0%

Riley O’Brien Approach › Plate Discipline

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team Zone% Str% Swing% O-Sw% Whiff% Foul Str% Con% Z-Con% O-Con% CS% SwStr% CSW% BIP% PLUS% IPR% Str-ICR
2021 CIN 31.0% 52.4% 42.9% 31.0% 38.9% 16.7% 61.1% 88.9% 33.3% 9.5% 16.7% 26.2% 9.5% 47.6% 0.38 42.9%
2022 SEA 52.2% 60.9% 47.8% 18.2% 18.2% 26.1% 81.8% 87.5% 100.0% 13.0% 8.7% 21.7% 13.0% 56.5% 0.39 -
2024 STL 42.8% 55.7% 39.7% 22.5% 27.3% 15.5% 72.7% 78.8% 60.0% 16.0% 10.8% 26.8% 13.4% 49.0% 0.38 43.3%
2025 STL 43.9% 62.0% 45.1% 30.6% 24.6% 17.5% 75.4% 89.6% 52.3% 16.9% 11.1% 28.0% 16.5% 57.7% 0.47 50.9%
2026 STL 41.6% 61.0% 44.4% 29.6% 26.9% 16.6% 73.1% 85.1% 54.2% 16.6% 12.0% 28.5% 15.9% 56.1% 0.47 50.6%
RP MLB Percentile 18 19 20 33 53 24 53 32 65 57 44 48 39 22 37 45
RP MLB AVG 44.5% 63.6% 47.2% 31.4% 25.7% 18.0% 74.3% 83.8% 58.5% 16.4% 12.1% 28.5% 17.1% 58.1% 0.50 50.9%
Career 42.7% 60.6% 44.2% 29.2% 26.1% 17.0% 73.9% 86.6% 53.5% 16.4% 11.5% 27.9% 15.7% 55.8% 0.46 49.9%

Riley O’Brien Approach › Locations

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team Zone% aLoc% x-mLoc% gLoc% hiLoc% y-mLoc% loLoc% iLoc% oLoc% mmLoc%
2021 CIN 31.0% 23.8% 11.9% 64.3% 21.4% 26.2% 52.4% 33.3% 54.8% 2.4%
2022 SEA 52.2% 36.4% 36.4% 27.3% 9.1% 27.3% 63.6% 18.2% 45.5% 9.1%
2024 STL 42.8% 35.6% 17.5% 46.9% 21.1% 28.9% 50.0% 36.1% 46.4% 8.2%
2025 STL 43.9% 32.2% 26.8% 41.0% 29.3% 21.5% 49.2% 30.1% 43.1% 5.5%
2026 STL 41.6% 33.1% 24.8% 42.1% 29.7% 22.8% 47.6% 34.3% 40.9% 7.1%
RP MLB Percentile 18 38 74 75 16 49 83 83 32 65
RP MLB AVG 44.5% 34.6% 26.9% 38.4% 36.4% 23.0% 40.7% 30.0% 43.1% 6.6%
Career 42.7% 32.8% 24.7% 42.5% 28.1% 23.0% 48.9% 32.4% 42.9% 6.4%

Riley O’Brien Approach › Counts

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team Early% Behind% 2-Str% Early BIP% F-Str% TF-Str% ECS% 2-Str O-Sw% PAR%
2021 CIN 57.1% 9.5% 33.3% 8.3% 66.7% 66.7% 16.7% 21.4% 14.3%
2022 SEA 56.5% 13.0% 30.4% 7.7% 60.0% 40.0% 15.4% - 14.3%
2024 STL 54.6% 20.6% 24.7% 11.3% 45.7% 37.0% 17.9% 25.0% 22.9%
2025 STL 59.8% 14.4% 27.0% 14.1% 61.6% 53.0% 21.4% 25.4% 22.0%
2026 STL 57.5% 11.5% 31.6% 16.0% 65.0% 48.9% 21.6% 22.4% 20.1%
RP MLB Percentile 38 60 72 77 74 33 60 15 52
RP MLB AVG 58.5% 12.3% 29.7% 14.5% 60.9% 50.1% 21.1% 26.5% 19.3%
Career 58.2% 13.8% 28.8% 14.4% 61.4% 49.8% 20.9% 23.5% 20.9%

Riley O’Brien PLV

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team P PLV QP% AP% BP% Q-BP% MTK% HP HL PLA
2021 CIN 42 4.08 26.2% 28.6% 45.2% -19.0% 0.0% 2.1 +0 12.60
2022 SEA 23 4.63 39.1% 13.0% 47.8% -8.7% 17.4% 0.7 +0 6.32
2024 STL 194 4.67 40.2% 18.6% 41.2% -1.0% 3.6% 6.5 +4 6.39
2025 STL 758 4.93 46.6% 16.3% 37.0% 9.6% 5.3% 0.2 +1 3.31
2026 STL 694 4.78 45.1% 14.7% 40.2% 4.9% 4.0% -5.2 -3 4.07
RP MLB Percentile 68 17 39 18 17 17 60 83 66 28
RP MLB AVG 591 4.94 45.9% 17.4% 36.8% 9.1% 4.6% 0.9 0 3.52
Career 1,711 4.82 44.7% 16.2% 39.1% 5.5% 4.6% 4.3 +3 4.03
Account / Login