WSH @ STLFinal 3-5, Sep 20, 2026
IP 1.0, H 0, R 0, ER 0, BB 0, K 0, HR 0, PC-ST 6-6, ERA 4.08, PC 6
BaseballMLBSt. Louis CardinalsRelief pitcher
Riley O'Brien
Stats, career and game logRiley O'Brien is a relief pitcher for the St. Louis Cardinals in MLB and was an All-Star in 2026.
Updated
About Riley O'Brien
Riley O'Brien is a relief pitcher for the St. Louis Cardinals in MLB, wearing number 61. Born on February 6, 1995, in Seattle, Washington, United States, he bats right-handed and throws right-handed. O'Brien made his MLB debut on Sep 28, 2021, with the Cincinnati Reds, and he was an All-Star in 2026.
Agatha Research DeskUpdated Oct 5, 2026How he is doing now
Cardinals77-852026 regular season
Injury status
No injury reports on file.
Game log
WSH @ STLFinal 8-5, Sep 19, 2026
IP 1.0, H 1, R 1, ER 0, BB 0, K 2, HR 0, PC-ST 12-9, ERA 4.14, PC 12
SF @ STLFinal 6-5, Sep 16, 2026
H-AB 0-0, AB 0, R 0, H 0, RBI 0, HR 0, BB 0, K 0, #P 0, AVG .000, OBP .000, SLG .000
IP 1.0, H 2, R 2, ER 1, BB 1, K 0, HR 1, PC-ST 16-9, ERA 4.21, PC 16
SF @ STLFinal 1-2, Sep 14, 2026
IP 1.0, H 1, R 0, ER 0, BB 1, K 2, HR 0, PC-ST 19-11, ERA 4.13, PC 19
Show all 10 games
CHW @ STLFinal 6-5, Sep 12, 2026
IP 1.0, H 1, R 2, ER 2, BB 1, K 2, HR 1, PC-ST 21-13, ERA 4.20, PC 21
CHW @ STLFinal 3-7, Sep 11, 2026
IP 1.0, H 0, R 0, ER 0, BB 0, K 1, HR 0, PC-ST 11-7, ERA 3.97, PC 11
STL @ SFFinal 4-5, Sep 7, 2026
H-AB 0-0, AB 0, R 0, H 0, RBI 0, HR 0, BB 0, K 0, #P 0, AVG .000, OBP .000, SLG .000
IP 1.0, H 1, R 1, ER 0, BB 2, K 0, HR 0, PC-ST 11-6, ERA 4.03, PC 11
STL @ COLFinal 7-6, Sep 4, 2026
IP 1.0, H 1, R 0, ER 0, BB 0, K 2, HR 0, PC-ST 12-10, ERA 4.11, PC 12
STL @ LADFinal 2-3, Sep 3, 2026
IP 0.1, H 2, R 2, ER 2, BB 1, K 0, HR 0, PC-ST 17-9, ERA 4.18, PC 17
STL @ LADFinal 8-6, Sep 2, 2026
IP 1.0, H 0, R 1, ER 0, BB 0, K 1, HR 0, PC-ST 17-12, ERA 3.88, PC 17
Box score lines from ESPN.
Did you know?!
NL saves leader in 2026
O'Brien was the NL saves leader in 2026.
Career
Honors
- All-Star (2026)
- NL saves leader (2026)
Sources and updates
Stats, scores and injury reports come from Agatha's own records: MLB's own box scores, its transactions and ESPN's injury reports.
Updated Oct 5, 2026, 11:12 PM ET. Results and form refresh after every game; biography facts are checked weekly.