Riley O'Brien - Bullpen Role & Save Probability
Riley O'Brien is currently the primary closer for the St. Louis Cardinals and profiles as one of their top save options.
Last updated:
Player Type
Relief Pitcher · St. Louis Cardinals
Bullpen Role
Closer
Usage Matrices
Sample: 2026-03-22 to 2026-04-20 (PT) · Total appearances: 11
Usage Matrix (%)
| Outs Remaining | <=-3 | -2 | -1 | tie | +1 | +2 | +3 | >=4 | Total |
|---|---|---|---|---|---|---|---|---|---|
| 10+ | - | - | - | - | - | - | - | - | - |
| 7–9 | - | - | - | - | - | 9.1% | - | - | 9.1% |
| 5–6 | - | - | - | - | - | - | - | - | - |
| 4 | - | - | - | 9.1%1 | - | - | - | - | 9.1% |
| <=3 | - | - | - | 18.2% | 9.1% | 36.4%2 3 | 9.1% | 9.1% | 81.8% |
| Total | - | - | - | 27.3% | 9.1% | 45.5% | 9.1% | 9.1% | 100.0% |
Notes
¹ most recent appearance
² second most recent appearance
³ third most recent appearance
Usage Matrix (Apps)
| Outs Remaining | <=-3 | -2 | -1 | tie | +1 | +2 | +3 | >=4 | Total |
|---|---|---|---|---|---|---|---|---|---|
| 10+ | - | - | - | - | - | - | - | - | - |
| 7–9 | - | - | - | - | - | 1 | - | - | 1 |
| 5–6 | - | - | - | - | - | - | - | - | - |
| 4 | - | - | - | 11 | - | - | - | - | 1 |
| <=3 | - | - | - | 2 | 1 | 42 3 | 1 | 1 | 9 |
| Total | - | - | - | 3 | 1 | 5 | 1 | 1 | 11 |
Notes
¹ most recent appearance
² second most recent appearance
³ third most recent appearance
Save Probability Trend
| Date (PT) | Save Probability | Model Role (Historical) |
|---|---|---|
| 2026-04-21 | 25% | Closer |
| 2026-04-20 | 25% | Closer |
| 2026-04-19 | 20% | Closer |
| 2026-04-18 | 22% | Closer |
| 2026-04-17 | 23% | Closer |
| 2026-04-15 | 26% | Closer |
| 2026-04-14 | 23% | Closer |
Team Bullpen Context
| Pitcher | Role | Save Probability |
|---|---|---|
| Riley O'Brien | Closer | 25% |
| JoJo Romero | Setup | 3% |
| Ryne Stanek | Setup | 1% |
Team page: St. Louis Cardinals Bullpen Hierarchy