RileyO'Brien

St. Louis Cardinals
#55
Relief Pitcher

HT/WT
6' 4", 180 lbs
Birthdate
2/6/1995 (30)
BAT/THR
Right/Right
Birthplace
Seattle, WA
Status
Active

pitching

season	Team
2021	CIN
2022	SEA
2024	STL
2025	STL
Career
Season Averages

GP	GS	W	L	W%	WAR	ERA	WHIP	IP	K	BB	K/BB	H	R	ER	SV	HLD	BLSV
1	1	0	1	.000	-0.1	13.50	3.75	1.1	2	3	0.7	2	2	2	0	0	0
1	0	0	0	.000	0.0	0.00	2.00	1.0	1	1	1.0	1	0	0	0	0	0
8	0	0	0	.000	-0.4	11.25	2.63	8.0	11	8	1.4	13	10	10	0	0	1
33	0	3	0	1.000	1.3	1.60	1.09	39.1	36	17	2.1	26	8	7	3	6	3
43	1	3	1	.750	--	3.44	1.43	49.2	50	29	1.7	42	20	19	3	6	4
11	0	1	0	.750	-	3.44	1.43	12.3	12	7	1.7	10	5	5	1	2	1

Opponent Batting

season	Team
2021	CIN
2022	SEA
2024	STL
2025	STL
Career

P	TBF	P-TBF	OBA	OOBP	OSLUG	OOPS	2B	3B	HR	TB	RBI	BH	SF
42	9	4.667	.333	.556	1.333	1.889	0	0	2	8	2	0	0
23	5	4.600	.250	.400	.250	.650	0	0	0	1	0	0	0
194	46	4.217	.361	.478	.639	1.117	2	1	2	23	11	1	1
616	158	3.899	.191	.297	.257	.555	3	0	2	35	9	4	1
875	218	4.014	.231	.349	.368	.717	5	1	6	67	22	5	2

Expanded Pitching

season	Team
2021	CIN
2022	SEA
2024	STL
2025	STL
Career

P/S	P/I	K/9	GSC	GB	FB	G/F	IR	IRS	WP	SB	CS	RSUP
42.0	31.5	13.5	41.0	2	2	1.0	0	0	0	0	0	1.0
0.0	23.0	9.0	0.0	3	0	0.0	0	0	0	0	0	0.0
0.0	24.3	12.4	0.0	10	16	0.6	3	2	1	0	0	0.0
0.0	15.7	8.2	0.0	54	47	1.1	9	3	3	2	1	0.0
42.0	17.6	9.1	0.0	69	65	1.1	12	5	4	2	1	1.0

WAR data provided by Baseball-Reference

Cardinals @ MarinersT-Mobile Park - Thu 9/11/25, TBDTickets as low as $12

Buy Cardinals tickets with VividSeats

Team	W	L	PCT	GB	STRK
Milwaukee	89	57	.610	-	L2
Chicago Cubs	82	63	.566	6.5	W1
Cincinnati	73	72	.503	15.5	W1
St. Louis	72	74	.493	17	L2
Pittsburgh	64	81	.441	24.5	L4

ESPN BET Sportsbook is owned and operated by PENN Entertainment, Inc. and its subsidiaries ('PENN'). ESPN BET is available in states where PENN is licensed to offer sports wagering. Must be 21+ to wager. If you or someone you know has a gambling problem and wants help, call 1-800-GAMBLER.

RileyO'Brien

Stats

Find Tickets

2025 NL Cent Standings