Stay up to date this MLB Season with the daily Baseball Reference Newsletter.

Riley O'Brien

Q: When was Riley O'Brien born?

Riley O'Brien was born on February 6, 1995.

Q: Where was Riley O'Brien born?

Riley O'Brien was born in Seattle, WA .

Q: How tall is Riley O'Brien?

Riley O'Brien is 6-4 (193 cm) tall.

Q: How much does Riley O'Brien weigh?

Riley O'Brien weighs 180 lbs (81 kg).

Q: How many seasons has Riley O'Brien played?

Riley O'Brien is in his 3rd season.

Q: When was Riley O'Brien drafted?

Riley O'Brien was drafted by the Tampa Bay Rays in the 8th round of the 2017 MLB June Amateur Draft from College of Idaho (Caldwell, ID) .

Q: How many strikeouts does Riley O'Brien have?

Riley O'Brien has 2 strikeouts this season and has 5 strikeouts over his career.

Q: How many teams has Riley O'Brien played for?

Riley O'Brien has played for 3 teams; the Cincinnati Reds, Seattle Mariners and St. Louis Cardinals.

Q: What is Riley O'Brien's Twitter account?

Riley O'Brien is on Twitter at RileyyOBrienn .

Q: What is Riley O'Brien's Instagram account?

Riley O'Brien is on Instagram at rileyyobrien .

Position: Pitcher

Bats: Right • Throws: Right

6-4, 180lb (193cm, 81kg)

Team: St. Louis Cardinals (majors, 60-day IL)

Born: February 6, 1995 in Seattle, WA us

Draft: Drafted by the Tampa Bay Rays in the 8th round of the 2017 MLB June Amateur Draft from College of Idaho (Caldwell, ID).

School: College of Idaho (Caldwell, ID)

Debut: September 28, 2021 (Age 26-234d, 22,540th in major league history)
vs. CHW 1.1 IP, 2 H, 2 SO, 3 BB, 2 ER, L

Rookie Status: Still Intact through 2024

2024 Contract Status: Not Updated

Full Name: Riley Chun-Young O'Brien

Twitter: @RileyyOBrienn

Instagram: @rileyyobrien

View Player Info from the B-R Bullpen

Relatives: Grandson of Johnny O'Brien; Greatnephew of Eddie O'Brien

Become a Stathead & surf this site ad-free.

SUMMARY

2024

Career

WAR

0.0

-0.1

ERA

9.00

8.10

1.0

3.1

WHIP

3.000

5/29 Cardinals right-hander Keynan Middleton is headed for an MRI on his right elbow and forearm this Friday, manager Oli Marmol tells the Cardinals beat (X link via John Denton of MLB.com). There’s now
See More at MLBTradeRumors

Standard Pitching

Standard Pitching
Year	Age	Tm	Lg	W	L	W-L%	ERA	G	GS	GF	CG	SHO	SV	IP	H	R	ER	HR	BB	IBB	SO	HBP	BK	WP	BF	ERA+	FIP	WHIP	H9	HR9	BB9	SO9	SO/W	Awards
2017	22	TBR-min	Rk	1	0	1.000	2.20	11	10	0	0	0	0	41.0	28	10	10	1	17	0	40	4	0	3	159			1.098	6.1	0.2	3.7	8.8	2.35	PRI APPY
2018	23	TBR-min	A,A+	8	4	.667	2.75	25	13	3	1	1	0	88.1	59	32	27	4	42	1	103	2	0	9	357			1.143	6.0	0.4	4.3	10.5	2.45	BWG,POE MIDW,FLOR
2019	24	TBR-min	AA,A+	7	6	.538	3.16	20	17	0	1	1	0	102.2	76	41	36	6	44	0	107	7	0	11	429			1.169	6.7	0.5	3.9	9.4	2.43	MTG,POE SOUL,FLOR
2021	26	CIN-min	AAA	7	7	.500	4.55	23	22	0	0	0	0	112.2	93	59	57	16	55	1	121	10	0	7	490			1.314	7.4	1.3	4.4	9.7	2.20	LOU AAAE
2021	26	CIN	NL	0	1	.000	13.50	1	1	0	0	0	0	1.1	2	2	2	2	3	0	2	0	0	0	9	43	26.42	3.750	13.5	13.5	20.3	13.5	0.67
2022	27	SEA-CIN-min	AAA	1	3	.250	7.03	33	1	4	0	0	0	39.2	45	38	31	5	30	0	47	5	0	4	196			1.891	10.2	1.1	6.8	10.7	1.57	TAC,LOU PCL,IL
2022	27	SEA	AL	0	0		0.00	1	0	1	0	0	0	1.0	1	0	0	0	1	0	1	0	0	0	5		4.11	2.000	9.0	0.0	9.0	9.0	1.00

2023	28	SEA-min	AAA	2	5	.286	2.29	51	3	26	0	0	15	55.0	36	19	14	2	31	1	86	5	0	3	228			1.218	5.9	0.3	5.1	14.1	2.77	TAC PCL
2024	29	STL	NL	0	0		9.00	1	0	0	0	0	0	1.0	1	1	1	0	2	0	2	0	0	0	6	62	5.13	3.000	9.0	0.0	18.0	18.0	1.00
3 Yrs				0	1	.000	8.10	3	1	1	0	0	0	3.1	4	3	3	2	6	0	5	0	0	0	20	69	13.34	3.000	10.8	5.4	16.2	13.5	0.83
162 Game Avg.				0	17	.000	8.10	51	17	17	0	0	0	56	68	51	51	34	102	0	85	0	0	0	340	69	13.34	3.000	10.8	5.4	16.2	13.5	0.83

STL (1 yr)				0	0		9.00	1	0	0	0	0	0	1.0	1	1	1	0	2	0	2	0	0	0	6	62	5.13	3.000	9.0	0.0	18.0	18.0	1.00
CIN (1 yr)				0	1	.000	13.50	1	1	0	0	0	0	1.1	2	2	2	2	3	0	2	0	0	0	9	43	26.42	3.750	13.5	13.5	20.3	13.5	0.67
SEA (1 yr)				0	0		0.00	1	0	1	0	0	0	1.0	1	0	0	0	1	0	1	0	0	0	5		4.11	2.000	9.0	0.0	9.0	9.0	1.00

NL (2 yrs)				0	1	.000	11.57	2	1	0	0	0	0	2.1	3	3	3	2	5	0	4	0	0	0	15	49	17.29	3.429	11.6	7.7	19.3	15.4	0.80
AL (1 yr)				0	0		0.00	1	0	1	0	0	0	1.0	1	0	0	0	1	0	1	0	0	0	5		4.11	2.000	9.0	0.0	9.0	9.0	1.00

Player Value--Pitching

WAR Explained (v2.2): 8+ MVP, 5+ A-S, 2+ Starter, 0-2 Sub, < 0 Repl

Batting Against -- Pitching *

Win Probability *

Become a Stathead & surf this site ad-free.

Starting Pitching *

Data only available back to 1901

Reliever Pitching *

Data only available back to 1901

Ratio Pitching *

Pitch Summary -- Pitching *

Baserunning & Situational Stats *

Cumulative Pitching

Neutralized Pitching

Advanced Pitching

See More Advanced Pitching

* - Disclaimer & Completeness Note

Frequently Asked Questions

How old is Riley O'Brien?

Riley O'Brien is 29 years old.

When was Riley O'Brien born?

Riley O'Brien was born on February 6, 1995.

Where was Riley O'Brien born?

Riley O'Brien was born in Seattle, WA.

How tall is Riley O'Brien?

Riley O'Brien is 6-4 (193 cm) tall.

How much does Riley O'Brien weigh?

Riley O'Brien weighs 180 lbs (81 kg).

How many seasons has Riley O'Brien played?

Riley O'Brien is in his 3rd season.

When was Riley O'Brien drafted?

Riley O'Brien was drafted by the Tampa Bay Rays in the 8th round of the 2017 MLB June Amateur Draft from College of Idaho (Caldwell, ID).

What position does Riley O'Brien play?

Riley O'Brien is a Pitcher.

How many strikeouts does Riley O'Brien have?

Riley O'Brien has 2 strikeouts this season and has 5 strikeouts over his career.

How many teams has Riley O'Brien played for?

Riley O'Brien has played for 3 teams; the Cincinnati Reds, Seattle Mariners and St. Louis Cardinals.

What is Riley O'Brien's Twitter account?

Riley O'Brien is on Twitter at RileyyOBrienn.

What is Riley O'Brien's Instagram account?

Riley O'Brien is on Instagram at rileyyobrien.

Other Resources & Links

More O'Brien Pages

Riley O'Brien Overview

Amateur, College & Minor Lg Stats

Pitching Splits

Pitching Game Logs

Fielding Game Logs

Pitching Finders & Advanced Stats

Fielding Finders & Advanced Stats

Advanced Stats

More Riley O'Brien Pages at Baseball Reference