Riley O'Brien

#61 P · B/T: R/R · 6' 4", 180 lb · Age 31 · Seattle, WA, USA · MLB debut 2021 · Draft: 2017 Rd 8 #229 (TB) — College of Idaho · St. Louis Cardinals

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Career Graph

Season	Team	W	L	SV	G	GS	QS	IP	IP/G	SO	K/9	BB/9	ERA	FIP	WAR
2021	CIN	0	1	0	1	1	—	1.1	1.3	2	13.5	20.3	13.50	—	—
2022	SEA	0	0	0	1	0	—	1.0	1.0	1	9.0	9.0	0.00	—	—
2024	STL	0	0	0	8	0	—	8.0	1.0	11	12.4	9.0	11.25	—	—
2025	STL	3	1	6	42	0	0	48.0	1.1	45	8.4	4.1	2.06	3.61	0.3
2026	STL	3	7	36	60	0	0	58.0	1.0	57	8.8	4.0	4.03	3.57	0.6
2026 pace		3	8	40	67	0		65.0		64
Career		6	9	42	112	1	0	116.1	1.0	116	9.0	4.6	3.79	—	0.9

Season	Team	W	L	SV	G	GS	QS	IP	IP/G	SO	K/9	BB/9	ERA
Triple-A (AAA)
2021	LOU	7	7	0	23	22	—	112.2	4.9	121	9.7	4.4	4.55
2022	TAC	1	3	0	33	1	—	39.2	1.2	47	10.7	6.8	7.03
2023	TAC	2	5	15	51	3	—	55.0	1.1	86	14.1	5.1	2.29
2024	MEM	1	0	1	14	0	—	13.1	1.0	9	6.1	3.4	1.35
2025	MEM	1	0	3	19	0	0	19.1	1.0	32	14.9	3.7	2.79
AAA Total		12	15	19	140	26	0	240.0	1.7	295	11.1	4.8	4.13
Double-A (AA)
2019	MTG	5	6	0	14	11	—	68.2	4.9	72	9.4	3.8	3.93
AA Total		5	6	0	14	11	—	68.2	4.9	72	9.4	3.8	3.93
High-A (A+)
2018	CHA	4	3	0	10	8	—	40.0	4.0	37	8.3	4.7	3.60
2019	CHA	2	0	0	6	6	—	34.0	5.7	35	9.3	4.0	1.59
A+ Total		6	3	0	16	14	—	74.0	4.6	72	8.8	4.4	2.68
Single-A (A)
2018	BG	4	1	0	15	5	—	48.1	3.2	66	12.3	3.9	2.05
A Total		4	1	0	15	5	—	48.1	3.2	66	12.3	3.9	2.05
Rookie (Rk)
2017	PRN	1	0	0	11	10	—	41.0	3.7	40	8.8	3.7	2.20
Rk Total		1	0	0	11	10	—	41.0	3.7	40	8.8	3.7	2.20
Minors Total		28	25	19	196	66	0	472.0	2.4	545	10.4	4.4	3.49

Season	Team	G	BB%	K%	AVG	OBP	SLG	OPS	wOBA	wRC+	WAR
2026	STL	60	—	—	.000	.000	.000	.000	—	—	0.0
2026 pace		67
Career		60	—	—	—	—	—	—	—	—	0.0

Season	Team	G	PA	AB	R	H	2B	3B	HR	RBI	SB	BB	SO	BB%	K%	AVG	OBP	SLG	OPS
Triple-A (AAA)
2021	LOU	23	28	24	1	4	1	0	0	2	0	2	10	7.1%	35.7%	.167	.259	.208	.467
AAA Total		23	28	24	1	4	1	0	0	2	0	2	10	7.1%	35.7%	.167	.259	.208	.467
Single-A (A)
2018	BG	15	1	1	0	0	0	0	0	0	0	0	1	0.0%	100.0%	.000	.000	.000	.000
A Total		15	1	1	0	0	0	0	0	0	0	0	1	0.0%	100.0%	.000	.000	.000	.000
Minors Total		38	29	25	1	4	1	0	0	2	0	2	11	6.9%	37.9%	.160	.250	.200	.450

Season	Team	Pos	G	Inn	PO	A	E	FPCT
2026	STL	P	60	58.0	8	9	2	.895
Career		P	60	58.0	8	9	2	.895

Season	Team	Pos	G	Inn	PO	A	E	FPCT
Triple-A (AAA)
2021	LOU	P	23	112.2	12	8	1	.952
2022	TAC	P	33	39.2	3	4	0	1.000
2023	TAC	P	51	55.0	5	5	1	.909
2024	MEM	P	14	13.1	2	1	1	.750
2025	MEM	P	19	19.1	0	2	1	.667
AAA Total		—	140	240.0	22	20	4	.913
Double-A (AA)
2019	MTG	P	14	68.2	5	6	0	1.000
AA Total		—	14	68.2	5	6	0	1.000
High-A (A+)
2018	CHA	P	10	40.0	4	0	1	.800
2019	CHA	P	6	34.0	1	5	1	.857
A+ Total		—	16	74.0	5	5	2	.833
Single-A (A)
2018	BG	P	15	48.1	6	2	1	.889
A Total		—	15	48.1	6	2	1	.889
Rookie (Rk)
2017	PRN	P	11	41.0	3	11	0	1.000
Rk Total		—	11	41.0	3	11	0	1.000
Minors Total		—	196	472.0	41	44	7	.924