Riley O'Brien
Relief Pitcher · #61 · St. Louis Cardinals
Status: ActiveRole: Bullpen18 appearances
6' 4" · 180 lbs · Age 31 · 5 yrs exp · College of Idaho · Pro since 2021
RO
St. Louis Cardinals
Relief Pitcher
#61
Rafters file
Relief Pitcher
#61
Rafters file
Riley O'Brien
46/100 stock
Rafters Stock46/100
score inputsinput stack
Riley O'Brien rates 46/100 because the model is pricing 18.0 innings, 0 strikeouts, a 2.00 ERA, and a 0.89 WHIP for St. Louis Cardinals. Strongest inputs: STRIKEOUTS, COMMAND, RUN PREVENTION. Rafters call is Watch with the ticker waiting on a fresh movement signal. The caveat: role security keeps the call capped, availability is the main drag, no week-over-week lift yet.
2026 · pitching
2.00ERA
3W
20K
Milestones
2.00 ERA · sub-3Statistical Snapshot
W3
K20
ERA2
WHIP0.89
2026 · pitching
| GP | GS | W | L | ERA | WHIP | IP | K | BB | SV | HLD |
|---|---|---|---|---|---|---|---|---|---|---|
| 18 | 0 | 3 | 1 | 2.00 | 0.89 | 18.0 | 20 | 1 | 11 | 1 |
Game Context
Last game: W 2-1at San Diego Padres · May 7
Next gameat San Diego Padres · May 8, 9:45 PM ET5/8 – 9:45 PM EDT
Career Snapshot
pitching · 2021–2026
| GP | GS | W | L | W% | WAR | ERA | WHIP | IP | K | BB | K/BB | H | R | ER | SV | HLD | BLSV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 70 | 1 | 6 | 3 | .667 | — | 3.18 | 1.30 | 76.1 | 79 | 35 | 2.3 | 64 | 30 | 27 | 17 | 7 | 6 |
Opponent Batting · 2021–2026
| P | TBF | P-TBF | OBA | OOBP | OSLUG | OOPS | 2B | 3B | HR | TB | RBI | BH | SH | SF | IBB |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1284 | 329 | 3.903 | .228 | .332 | .335 | .667 | 8 | 2 | 6 | 94 | 34 | 10 | 1 | 2 | 2 |
Expanded Pitching · 2021–2026
| P/S | P/I | K/9 | GB | FB | G/F | IR | IRS | WP | SB | CS | RSUP |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 42.0 | 16.8 | 9.3 | 114 | 91 | 1.3 | 20 | 9 | 7 | 2 | 1 | 1.0 |
Season by Season
pitching
| Season | Team | GP | GS | W | L | W% | WAR | ERA | WHIP | IP | K | BB | K/BB | H | R | ER | SV | HLD | BLSV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021 | Cincinnati Reds | 1 | 1 | 0 | 1 | .000 | -0.1 | 13.50 | 3.75 | 1.1 | 2 | 3 | 0.7 | 2 | 2 | 2 | 0 | 0 | 0 |
| 2022 | Seattle Mariners | 1 | 0 | 0 | 0 | .000 | 0.0 | 0.00 | 2.00 | 1.0 | 1 | 1 | 1.0 | 1 | 0 | 0 | 0 | 0 | 0 |
| 2024 | St Louis Cardinals | 8 | 0 | 0 | 0 | .000 | -0.4 | 11.25 | 2.63 | 8.0 | 11 | 8 | 1.4 | 13 | 10 | 10 | 0 | 0 | 1 |
| 2025 | St Louis Cardinals | 42 | 0 | 3 | 1 | .750 | 1.5 | 2.06 | 1.15 | 48.0 | 45 | 22 | 2.0 | 33 | 13 | 11 | 6 | 6 | 3 |
| 2026 | St Louis Cardinals | 18 | 0 | 3 | 1 | .750 | 0.7 | 2.00 | 0.89 | 18.0 | 20 | 1 | 20.0 | 15 | 5 | 4 | 11 | 1 | 2 |
Opponent Batting
| Season | Team | P | TBF | P-TBF | OBA | OOBP | OSLUG | OOPS | 2B | 3B | HR | TB | RBI | BH | SH | SF | IBB |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021 | Cincinnati Reds | 42 | 9 | 4.667 | .333 | .556 | 1.333 | 1.889 | 0 | 0 | 2 | 8 | 2 | 0 | 0 | 0 | 0 |
| 2022 | Seattle Mariners | 23 | 5 | 4.600 | .250 | .400 | .250 | .650 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| 2024 | St Louis Cardinals | 194 | 46 | 4.217 | .361 | .478 | .639 | 1.117 | 2 | 1 | 2 | 23 | 11 | 1 | 0 | 1 | 0 |
| 2025 | St Louis Cardinals | 758 | 199 | 3.809 | .196 | .313 | .274 | .587 | 5 | 1 | 2 | 46 | 13 | 7 | 1 | 1 | 2 |
| 2026 | St Louis Cardinals | 267 | 70 | 3.814 | .224 | .257 | .239 | .496 | 1 | 0 | 0 | 16 | 0 | 2 | 0 | 0 | 0 |
Expanded Pitching
| Season | Team | P/S | P/I | K/9 | QS | CG | SHO | GSC | GB | FB | G/F | IR | IRS | WP | BK | SB | CS | RSUP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021 | Cincinnati Reds | 42.0 | 31.5 | 13.5 | 0 | 0 | 0 | 41.0 | 2 | 2 | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 |
| 2022 | Seattle Mariners | 0.0 | 23.0 | 9.0 | 0 | 0 | 0 | 0.0 | 3 | 0 | 0.0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.0 |
| 2024 | St Louis Cardinals | 0.0 | 24.3 | 12.4 | 0 | 0 | 0 | 0.0 | 10 | 16 | 0.6 | 3 | 2 | 1 | 0 | 0 | 0 | 0.0 |
| 2025 | St Louis Cardinals | 0.0 | 15.8 | 8.4 | 0 | 0 | 0 | 0.0 | 69 | 56 | 1.2 | 10 | 3 | 3 | 0 | 2 | 1 | 0.0 |
| 2026 | St Louis Cardinals | 0.0 | 14.8 | 10.0 | 0 | 0 | 0 | 0.0 | 22 | 10 | 2.2 | 0 | 4 | 3 | 0 | 0 | 0 | 0.0 |
Latest News
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MLB · Last synced 2026-05-09