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Michael Petersen

Position: Relief Pitcher

Bats: Right • Throws: Right

6-7, 195lb (201cm, 88kg)

Born: May 16, 1994 in Middlesex gb

Draft: Drafted by the Pittsburgh Pirates in the 19th round of the 2012 MLB June Amateur Draft from St. Francis HS (Mountain View, CA), the Texas Rangers in the 31st round of the 2013 MLB June Amateur Draft from West Valley College (Saratoga, CA), the San Francisco Giants in the 24th round of the 2014 MLB June Amateur Draft from Riverside City College (Riverside, CA) and the Milwaukee Brewers in the 17th round of the 2015 MLB June Amateur Draft from Riverside City College (Riverside, CA).

High School: St. Francis HS (Mountain View, CA)

Schools: Riverside City College (Riverside, CA), West Valley College (Saratoga, CA)

Rookie Status: Exceeded rookie limits during 2024 season

2026 Contract Status: Pre-Arb Eligible

Service Time (01/2026): 0.086 • Arb Eligible: 2029 • Free Agent: 2032

Full Name: Michael Kenechukwu Petersen

View Player Info from the B-R Bullpen

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SUMMARY

2026

Career

WAR

0.7

0.5

ERA

3.07

4.00

41.0

78.2

WHIP

1.000

1.246

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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
2015	21	0.7	Battle Creek	NWDS	Smr		1	2	.333	2.45	3.68	9	1	4	0	0	0	14.2	7	6	4	0	7	0	17	3	0	1	60	0.955	4.3	0.0	4.3	10.4	2.43
2015	21	0.5	Brewers	ARIZ	Rk	MIL	1	0	1.000	1.35	2.70	4	3	0	0	0	0	6.2	3	2	1	0	2	0	5	1	0	2	25	0.750	4.1	0.0	2.7	6.8	2.50
2016	22	0.6	Helena	PION	Rk	MIL	1	3	.250	7.71	9.26	10	5	1	0	0	0	23.1	41	24	20	4	13	0	19	7	1	2	125	2.314	15.8	1.5	5.0	7.3	1.46
2017	23	1.6	Helena	PION	Rk	MIL	1	3	.250	6.41	6.99	15	9	1	0	0	0	46.1	51	36	33	5	31	0	48	8	1	5	221	1.770	9.9	1.0	6.0	9.3	1.55
2018	24	2.1	Wisconsin	MIDW	A	MIL	2	1	.667	3.46	3.72	32	0	9	0	0	4	67.2	61	28	26	5	25	2	62	7	0	4	282	1.271	8.1	0.7	3.3	8.2	2.48
2019	25	1.8	Carolina	CARL	A+	MIL	1	2	.333	3.00	3.17	41	0	17	0	0	2	54.0	35	19	18	4	34	0	65	4	0	4	230	1.278	5.8	0.7	5.7	10.8	1.91

2022	28	6.8	Rockies	ACL	Rk	COL	0	0		0.00	0.00	1	1	0	0	0	0	1.0	0	0	0	0	0	0	2	0	0	0	3	0.000	0.0	0.0	0.0	18.0
2022	28	0.6	Great Britain	WBCQ	WBC		0	0		4.50	4.50	2	0	1	0	0	0	2.0	2	1	1	0	0	0	5	0	0	0	8	1.000	9.0	0.0	0.0	22.5
2023	29		2 Teams	2 Lgs	AAA-AA	COL	2	2	.500	3.46	4.10	41	0	14	0	0	2	41.2	38	19	16	3	25	1	49	5	2	3	186	1.512	8.2	0.6	5.4	10.6	1.96
2023	29	1.7	Albuquerque	PCL	AAA	COL	1	1	.500	3.68	4.09	22	0	8	0	0	1	22.0	23	10	9	2	17	0	21	2	1	2	102	1.818	9.4	0.8	7.0	8.6	1.24
2023	29	4.6	Hartford	EL	AA	COL	1	1	.500	3.20	4.12	19	0	6	0	0	1	19.2	15	9	7	1	8	1	28	3	1	1	84	1.169	6.9	0.5	3.7	12.8	3.50
2023	29	0.6	Great Britain	WBC	WBC		0	0		0.00	0.00	1	0	1	0	0	0	1.0	0	0	0	0	1	0	1	0	0	0	4	1.000	0.0	0.0	9.0	9.0	1.00
2024	30		2 Teams	NL	Maj	MIA-LAD	3	1	.750	5.95	6.41	16	0	5	0	0	0	19.2	21	14	13	3	11	1	14	1	1	0	90	1.627	9.6	1.4	5.0	6.4	1.27
2024	30	2.5	Oklahoma City	PCL	AAA	LAD	2	0	1.000	1.64	1.91	35	0	21	0	0	10	33.0	17	7	6	1	8	0	44	0	0	1	125	0.758	4.6	0.3	2.2	12.0	5.50
2024	30	0.9	LAD	NL	Maj	LAD	3	0	1.000	6.43	6.43	11	0	3	0	0	0	14.0	14	10	10	3	8	0	11	1	1	0	64	1.571	9.0	1.9	5.1	7.1	1.38
2024	30	0.9	MIA	NL	Maj	MIA	0	1	.000	4.76	6.35	5	0	2	0	0	0	5.2	7	4	3	0	3	1	3	0	0	0	26	1.765	11.1	0.0	4.8	4.8	1.00
2025	31		3 Teams	2 Lgs	AAA	ATL-MIA	0	1	.000	4.46	4.46	33	1	6	0	0	1	36.1	40	18	18	5	12	0	47	2	1	1	161	1.431	9.9	1.2	3.0	11.6	3.92
2025	31		2 Teams	NL	Maj	ATL-MIA	0	0		4.00	5.50	15	0	4	0	0	0	18.0	18	11	8	3	7	2	17	0	0	2	79	1.389	9.0	1.5	3.5	8.5	2.43
2025	31	3.9	Salt Lake	PCL	AAA	LAA	0	0		13.50	13.50	1	0	0	0	0	0	1.1	4	2	2	0	0	0	2	0	0	0	8	3.000	27.0	0.0	0.0	13.5
2025	31	3.7	Gwinnett	IL	AAA	ATL	0	0		3.13	3.13	20	0	1	0	0	0	23.0	25	8	8	2	7	0	26	1	1	1	101	1.391	9.8	0.8	2.7	10.2	3.71
2025	31	3.7	Jacksonville	IL	AAA	MIA	0	1	.000	6.00	6.00	12	1	5	0	0	1	12.0	11	8	8	3	5	0	19	1	0	0	52	1.333	8.3	2.3	3.8	14.3	3.80
2025	31	1.9	ATL	NL	Maj	ATL	0	0		4.05	4.05	4	0	2	0	0	0	6.2	7	3	3	1	2	0	5	0	0	1	28	1.350	9.5	1.4	2.7	6.8	2.50
2025	31	1.9	MIA	NL	Maj	MIA	0	0		3.97	6.35	11	0	2	0	0	0	11.1	11	8	5	2	5	2	12	0	0	1	51	1.412	8.7	1.6	4.0	9.5	2.40
2026	32	2.7	MIA	NL	Maj	MIA	1	1	.500	3.07	3.51	39	0	4	0	0	1	41.0	26	16	14	4	15	1	48	2	0	1	163	1.000	5.7	0.9	3.3	10.5	3.20
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		4	2	.667	4.00	4.69	70	0	13	0	0	1	78.2	65	41	35	10	33	4	79	3	1	3	332	1.246	7.4	1.1	3.8	9.0	2.39
Minors (9 seasons)					Minors		10	12	.455	4.01	4.44	212	19	69	0	0	19	310.0	286	153	138	27	150	3	341	34	5	22	1358	1.406	8.3	0.8	4.4	9.9	2.27
Other (3 seasons)					Other		1	2	.333	2.55	3.57	12	1	6	0	0	0	17.2	9	7	5	0	8	0	23	3	0	1	72	0.962	4.6	0.0	4.1	11.7	2.88
All Levels (10 Seasons)							15	16	.484	3.94	4.45	294	20	88	0	0	20	406.1	360	201	178	37	191	7	443	40	6	26	1762	1.356	8.0	0.8	4.2	9.8	2.32

AAA (3 seasons)					Minors		3	2	.600	3.25	3.45	90	1	35	0	0	12	91.1	80	35	33	8	37	0	112	4	2	4	388	1.281	7.9	0.8	3.6	11.0	3.03
AA (1 season)					Minors		1	1	.500	3.20	4.12	19	0	6	0	0	1	19.2	15	9	7	1	8	1	28	3	1	1	84	1.169	6.9	0.5	3.7	12.8	3.50
A+ (1 season)					Minors		1	2	.333	3.00	3.17	41	0	17	0	0	2	54.0	35	19	18	4	34	0	65	4	0	4	230	1.278	5.8	0.7	5.7	10.8	1.91
A (1 season)					Minors		2	1	.667	3.46	3.72	32	0	9	0	0	4	67.2	61	28	26	5	25	2	62	7	0	4	282	1.271	8.1	0.7	3.3	8.2	2.48
Rk (4 seasons)					Minors		3	6	.333	6.28	7.22	30	18	2	0	0	0	77.1	95	62	54	9	46	0	74	16	2	9	374	1.823	11.1	1.0	5.4	8.6	1.61
Smr (1 season)					Other		1	2	.333	2.45	3.68	9	1	4	0	0	0	14.2	7	6	4	0	7	0	17	3	0	1	60	0.955	4.3	0.0	4.3	10.4	2.43
WBC (2 seasons)					Other		0	0		3.00	3.00	3	0	2	0	0	0	3.0	2	1	1	0	1	0	6	0	0	0	12	1.000	6.0	0.0	3.0	18.0	6.00