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Seth Halvorsen

Positions: Relief Pitcher and Centerfielder

Bats: Right • Throws: Right

6-2, 243lb (188cm, 110kg)

Team: Colorado Rockies (minors, 40-man)

Born: February 18, 2000 in Chicago, IL us

Draft: Drafted by the Minnesota Twins in the 30th round of the 2018 MLB June Amateur Draft from Heritage Christian Academy (Maple Grove, MN), the Philadelphia Phillies in the 19th round of the 2021 MLB June Amateur Draft from University of Missouri (Columbia, MO) and the Colorado Rockies in the 7th round of the 2023 MLB June Amateur Draft from University of Tennessee (Knoxville, TN).

High School: Heritage Christian Academy (Maple Grove, MN)

Schools: University of Missouri (Columbia, MO), University of Tennessee (Knoxville, TN)

Rookie Status: Exceeded rookie limits during 2025 season

2026 Contract Status: Pre-Arb Eligible

Service Time (01/2026): 1.031 • Arb Eligible: 2028 • Free Agent: 2031

Full Name: Seth Michael Halvorsen

Instagram: @seth_halvorsen

View Player Info from the B-R Bullpen

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SUMMARY

2026

Career

WAR

0.4

1.3

ERA

3.31

3.95

16.1

68.1

WHIP

1.776

1.478

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Year	Age	AgeDif	Tm	Lg	Lev	Aff	W	L	W-L%	ERA	RA9	G	GS	GF	CG	SHO	SV	IP	H	R	ER	HR	BB	IBB	SO	HBP	BK	WP	BF	WHIP	H9	HR9	BB9	SO9	SO/W
2019	19	-1.4	Missouri	SEC	NCAA		0	0		3.38	3.38	4	0		0	0	0	5.1	1	2	2	0	6	0	2	3	0	1	26	1.313	1.7	0.0	10.1	3.4	0.33
2021	21	0.2	Missouri	SEC	NCAA		4	2	.667	6.00	6.75	14	14		0	0	0	72.0	68	54	48	10	57	0	70	13	0	7	338	1.736	8.5	1.3	7.1	8.8	1.23
2021	21	0.6	Hyannis	CCBL	Smr		0	2	.000	12.27	12.27	3	3	0	0	0	0	7.1	10	10	10	1	10	0	6	2	0	5	45	2.727	12.3	1.2	12.3	7.4	0.60
2023	23	2.2	Tennessee	SEC	NCAA		3	3	.500	3.81	5.19	25	1		0	0	2	52.0	39	30	22	9	16	2	52	4	1	2	216	1.058	6.8	1.6	2.8	9.0	3.25
2023	23		3 Teams	3 Lgs	AA-A+-Rk	COL	2	0	1.000	2.70	2.70	13	0	1	0	0	0	13.1	14	4	4	2	4	0	13	0	0	0	55	1.350	9.5	1.4	2.7	8.8	3.25
2023	23	-1.4	Hartford	EL	AA	COL	0	0		3.00	3.00	6	0	0	0	0	0	6.0	5	2	2	1	3	0	5	0	0	0	24	1.333	7.5	1.5	4.5	7.5	1.67
2023	23	-0.1	Spokane	NORW	A+	COL	0	0		3.60	3.60	5	0	1	0	0	0	5.0	6	2	2	1	1	0	5	0	0	0	21	1.400	10.8	1.8	1.8	9.0	5.00
2023	23	1.7	Rockies	ACL	Rk	COL	2	0	1.000	0.00	0.00	2	0	0	0	0	0	2.1	3	0	0	0	0	0	3	0	0	0	10	1.286	11.6	0.0	0.0	11.6
2024	24		2 Teams	2 Lgs	AA-AAA	COL	5	2	.714	4.47	4.87	41	0	22	0	0	9	44.1	42	24	22	3	23	1	56	4	2	3	196	1.466	8.5	0.6	4.7	11.4	2.43
2024	24	-3.5	Albuquerque	PCL	AAA	COL	1	0	1.000	3.00	3.00	8	0	4	0	0	1	9.0	8	3	3	1	4	0	15	0	0	0	38	1.333	8.0	1.0	4.0	15.0	3.75
2024	24	-0.5	Hartford	EL	AA	COL	4	2	.667	4.84	5.35	33	0	18	0	0	8	35.1	34	21	19	2	19	1	41	4	2	3	158	1.500	8.7	0.5	4.8	10.4	2.16
2024	24	-5.1	COL	NL	Maj	COL	2	1	.667	1.46	2.19	12	0	8	0	0	2	12.1	8	3	2	2	2	0	13	1	1	0	46	0.811	5.8	1.5	1.5	9.5	6.50
2025	25	-4.1	COL	NL	Maj	COL	1	2	.333	4.99	5.90	42	0	23	0	0	11	39.2	41	26	22	7	21	1	36	0	0	3	173	1.563	9.3	1.6	4.8	8.2	1.71
2026	26	-1.7	Albuquerque	PCL	AAA	COL	1	0	1.000	2.16	2.70	15	0	10	0	0	3	16.2	13	5	4	1	7	0	24	1	0	0	70	1.200	7.0	0.5	3.8	13.0	3.43
2026	26	-3.3	COL	NL	Maj	COL	0	0		3.31	3.31	18	0	4	0	0	0	16.1	15	6	6	2	14	1	16	0	0	2	79	1.776	8.3	1.1	7.7	8.8	1.14
Year	Age	AgeDif	Tm	Lg	Lev	Aff	W	L	W-L%	ERA	RA9	G	GS	GF	CG	SHO	SV	IP	H	R	ER	HR	BB	IBB	SO	HBP	BK	WP	BF	WHIP	H9	HR9	BB9	SO9	SO/W
Majors (3 seasons)					Majors		3	3	.500	3.95	4.61	72	0	35	0	0	13	68.1	64	35	30	11	37	2	65	1	1	5	298	1.478	8.4	1.4	4.9	8.6	1.76
Minors (3 seasons)					Minors		8	2	.800	3.63	4.00	69	0	33	0	0	12	74.1	69	33	30	6	34	1	93	5	2	3	321	1.386	8.4	0.7	4.1	11.3	2.74
College (3 seasons)					College		7	5	.583	5.01	5.98	43	15		0	0	2	129.1	108	86	72	19	79	2	124	20	1	10	580	1.446	7.5	1.3	5.5	8.6	1.57
Other (1 season)					Other		0	2	.000	12.27	12.27	3	3	0	0	0	0	7.1	10	10	10	1	10	0	6	2	0	5	45	2.727	12.3	1.2	12.3	7.4	0.60
All Levels (6 Seasons)							18	12	.600	4.58	5.28	187	18	68	0	0	27	279.1	251	164	142	37	160	5	288	28	4	23	1244	1.471	8.1	1.2	5.2	9.3	1.80

AAA (2 seasons)					Minors		2	0	1.000	2.45	2.81	23	0	14	0	0	4	25.2	21	8	7	2	11	0	39	1	0	0	108	1.247	7.4	0.7	3.9	13.7	3.55
AA (2 seasons)					Minors		4	2	.667	4.57	5.01	39	0	18	0	0	8	41.1	39	23	21	3	22	1	46	4	2	3	182	1.476	8.5	0.7	4.8	10.0	2.09
A+ (1 season)					Minors		0	0		3.60	3.60	5	0	1	0	0	0	5.0	6	2	2	1	1	0	5	0	0	0	21	1.400	10.8	1.8	1.8	9.0	5.00
Rk (1 season)					Minors		2	0	1.000	0.00	0.00	2	0	0	0	0	0	2.1	3	0	0	0	0	0	3	0	0	0	10	1.286	11.6	0.0	0.0	11.6