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Riley O'Brien

P · STL

31 yrs

Pitcher

Description

Position: P
Team: STL
Type: Pitcher
Bats: Right
Throws: Right
Born: 1995-02-06
Age: 31
Country: USA
Height: 6'4"
Weight: 180 lb
Last active: 2026

Career Résumé

5 seasons

Seasons	5 2021–2026
Games	84
W-L	6-5
ERA	3.77
WHIP	1.36
IP	91
SO	92
SV	24

Pitching Projections

2026 · per ~700 BF

Stat	Proj	Range (p10–p90)	vs LY
SO	159	122–189	+1
BB	73	55–91	+2
HR	16	11–23	-1
Hits	144	119–172	+3
ER	70	55–96	+4

Pitching

Regular season

Season	Tm	W	L	ERA	WHIP	G	GS	SV	IP	SO	BB	HR	ER	xERA	Brl%
2026	STL	3	3	4.18	1.24	32	0	18	32.1	33	11	2	15	4.46	5.4%
2025	STL	3	1	2.06	1.15	42	0	6	48.0	45	22	2	11	3.64	3.2%
2024	STL	0	0	11.25	2.63	8	0	0	8.0	11	8	2	10	6.35	7.7%
2022	SEA	0	0	0.00	2.00	1	0	0	1.0	1	1	0	0	2.31	0.0%
2021	CIN	0	1	13.50	3.75	1	1	0	1.1	2	3	2	2	28.84	50.0%

Season	Pos	G	GS	Inn	PO	A	DP	FLD%	RF/9	OAA
2026	P	30	0	30.1	6	5	0	1.000	3.26	—
2025	P	42	0	48.0	5	8	1	1.000	2.44	—
2024	P	8	0	8.0	0	0	0	—	0.00	—
2022	P	1	0	1.0	0	0	0	—	0.00	—
2021	P	1	1	1.1	0	0	0	—	0.00	—

Batting game log

2026 · last 3

Date		Opp	Res
2026-06-28	vs	MIA	W
2026-06-22	vs	AZ	W
2026-06-21	@	KC	W

Pitching game log

2026 · last 34

Date		Opp	Res	Dec	IP	H	R	ER	HR	BB	SO	Pit
2026-06-28	vs	MIA	W	S	1.0	0	0	0	0	0	1	15
2026-06-22	vs	AZ	W	S	1.0	0	0	0	0	0	0	17
2026-06-21	@	KC	W	ND	1.0	2	2	2	1	0	1	12
2026-06-16	vs	SD	W	S	1.0	0	0	0	0	1	0	13
2026-06-13	@	MIN	W	ND	1.0	0	1	1	0	3	1	31
2026-06-07	vs	CIN	W	S	1.0	1	0	0	0	0	1	15
2026-06-06	vs	CIN	W	S	1.0	2	0	0	0	1	1	23
2026-06-03	vs	TEX	W	S	1.0	0	0	0	0	1	0	13
2026-06-02	vs	TEX	L	L	1.0	3	3	3	0	1	2	32
2026-05-29	vs	CHC	W	S	1.0	1	1	1	0	0	0	14
2026-05-23	@	CIN	L	L	1.1	0	1	0	0	1	2	20
2026-05-19	vs	PIT	W	BS	1.0	2	2	2	0	1	0	22
2026-05-15	vs	KC	W	ND	1.0	1	0	0	0	0	0	10
2026-05-14	@	ATH	W	S	1.0	0	0	0	0	0	2	16
2026-05-12	@	ATH	W	S	1.0	0	0	0	0	1	0	13
2026-05-10	@	SD	L	BS	1.0	2	2	2	1	0	3	31
2026-05-07	@	SD	W	S	1.0	0	0	0	0	0	1	10
2026-05-04	vs	MIL	W	S	0.2	0	0	0	0	0	0	3
2026-05-02	vs	LAD	W	S	1.0	4	2	2	0	0	2	26
2026-04-29	@	PIT	W	S	1.0	1	0	0	0	0	1	11
2026-04-25	vs	SEA	L	L	1.0	4	2	2	0	1	1	39
2026-04-21	@	MIA	W	S	1.0	1	0	0	0	0	1	17
2026-04-19	@	HOU	W	W	1.1	1	0	0	0	0	2	19
2026-04-18	@	HOU	W	S	0.2	0	0	0	0	0	1	7
2026-04-15	vs	CLE	W	S	1.0	0	0	0	0	0	2	15
2026-04-14	vs	CLE	W	W	1.0	0	0	0	0	0	1	15
2026-04-10	vs	BOS	W	S	1.0	0	0	0	0	0	1	8
2026-04-08	@	WSH	W	ND	1.0	0	0	0	0	0	0	15
2026-04-07	@	WSH	W	S	1.0	0	1	0	0	0	2	16
2026-04-05	@	DET	W	S	1.0	0	0	0	0	0	1	13
2026-04-01	vs	NYM	W	ND	1.0	1	0	0	0	0	2	16
2026-03-31	vs	NYM	W	S	1.0	0	0	0	0	0	0	11
2026-03-28	vs	TB	W	H	1.0	2	0	0	0	0	0	9
2026-03-26	vs	TB	W	W	1.1	1	0	0	0	0	2	17

Pitching Profile2026 · vs 168

K/9

9.271

BB/9

3.153

HR/9

0.693

ERA

4.1840

WHIP

1.2456

xERA

4.4640

Brl%A

5.4%88

PlayerMedian (50th)percentile vs league

Career Highs

Stat	Best	Year
Wins	3	2026
SO	45	2025
SV	18	2026
ERA	0.00	2022
WHIP	1.15	2025

Comparable Players

2026 · stat-profile similarity

Anthony BandaMIN32y
4.22 ERA · 29 K · 1.25 WHIP
83%
vs
Enyel De Los SantosHOU30y
4.22 ERA · 31 K · 1.09 WHIP
82%
vs
Sean ManaeaNYM34y
4.64 ERA · 56 K · 1.34 WHIP
81%
vs
Shane DrohanMIL27y
3.40 ERA · 47 K · 1.17 WHIP
80%
vs
Spencer MilesTOR25y
3.26 ERA · 44 K · 1.09 WHIP
80%
vs

Career Arc

ERA by season · taller = better

Year over Year

pitching trajectory

Yr	Tm	W	ERA	WHIP	SO	IP
21	CIN	0	13.50	3.75	2	1
22	SEA	0	0.00▼	2.00▼	1▼	1▼
24	STL	0	11.25▲	2.63▲	11▲	8▲
25	STL	3▲	2.06▼	1.15▼	45▲	48▲
26	STL	3	4.18▲	1.24▲	33▼	32▼

Career Milestones

chase to the next mark

Wins6

44 to 50

Strikeouts92

908 to 1,000

Saves24

76 to 100

Season

Pitch Arsenal

2025 · Statcast

Pitch	Use	Velo	Spin
Sinker	48%	98.0	2184
Slider	30%	90.1	2529
Sweeper	21%	83.4	2445

Plate Discipline

2025 · induced

28.9%

Chase

lg 28.5%

63.3%

Z-Swing

lg 67%

24.3%

Whiff

lg 24.5%

75.7%

Contact

lg 76%

46.5%

Zone

lg 48.5%

27.5%

CSW

lg 28%

767 pitches · green/red vs league avg

Statcast Trend

xERA by season · taller = better

Barrel% Against by season · taller = better

Per game	3.0
Ceiling (90th)	6.4
Floor (10th)	-0.8
Std dev	3.2
Boom rate	24%
Bust rate	26%
Profile	Volatile