John Klein

John Klein [John Joseph Klein] is currently active in the Major Leagues with the Toronto Blue Jays. Ranked by MLB Pipeline as the Minnesota Twins No. 20 MLB prospect in 2026 pre-season Prospect rankings. Klein is 24 years old and was born on April 22nd, 2002 in Brooklyn Park, Minnesota. He played 2 years of Junior College Baseball for the Iowa Central Community College Tritons [NJCAA Region 11]. He was signed as an undrafted free agent by the Minnesota Twins in 2022. Made his Major League Debut on May 2nd, 2026 at the age of 24. Debuted as a relief pitcher for Minnesota Twins against the Toronto Blue Jays, throwing 1 inning, did not allow a run or a walk He did not factor in the decision. His most frequent teammates throughout his career, based on statistics listed ...

Show Full Career Summary

below were Zebby Matthews, C.J. Culpepper, Andrew Morris and Ricardo Olivar. Klein has played 5 seasons with the Minnesota Twins organization and 1 season with the Toronto Blue Jays. Finished 1st in Florida State League with 1 Complete Games in 2023. Finished 4th in Midwest League with 8 Wins in 2024. Finished 8th in Midwest League with 102 Hits Allowed in 2024. Finished 9th in Midwest League with 51 Earned Runs Allowed in 2024. Led the Florida State League (A) with 1 Complete Games in 2023.

Career Transactions: Traded from Twins with Dasan Hill and Damaruy Pena to Blue Jays for Jeff Hoffman and future considerations on August 3rd, 2026.

Pitching Statistics

CSV

Glossary

🔒

MLB Stats

Minor League Stats

College Stats

Yearly Summary

Unlock the power of TBC PREMIUM for only $2/month.

year	team name	league	level	mlb	#	age	tbc+	w	l	era	g	gs	cg	sho	gr	gf	sv	ip	h	r	er	hr	bb	so	wp	bk	hb	whip	h9	hr9	bb9	so9	ra9	so/bb
2021	Iowa Central CC	NJCAA-Reg11	NJCAA			19	115	7	3	3.68	12	12	5	0	0	0	0	71.0	66	43	29	6	37	82	0	0	0	1.45	8.37	0.76	4.69	10.39	5.45	2.22
2022	Iowa Central CC	NJCAA-Reg11	NJCAA			20	126	6	3	5.12	13	12	0	0	1	0	0	63.1	56	38	36	6	32	83	0	0	0	1.39	7.96	0.85	4.55	11.79	5.40	2.59
2022	FCL Twins	FCL	Rk	MIN	40	20		0	0	0.00	2	0	0	0	2	0	0	2.0	1	0	0	0	1	2	0	0	0	1.00	4.50	0.00	4.50	9.00	0.00	2.00
2023	FCL Twins	FCL	Rk	MIN	44	21	94	0	3	5.87	6	6	0	0	0	0	0	23.0	29	17	15	3	9	27	2	0	6	1.65	11.35	1.17	3.52	10.57	6.65	3.00
2023	Fort Myers Mighty Mussels	FSL2	A	MIN	44,46	21	123	2	1	2.97	6	6	1	0	0	0	0	30.1	18	10	10	1	13	30	0	1	3	1.02	5.34	0.30	3.86	8.90	2.97	2.31
2023	Cedar Rapids Kernels	Midw2	A+	MIN	40	21		0	0	3.60	1	1	0	0	0	0	0	5.0	6	2	2	0	1	4	1	0	1	1.40	10.80	0.00	1.80	7.20	3.60	4.00
2024	Cedar Rapids Kernels	Midw2	A+	MIN	40	22	93	8	3	4.57	22	20	0	0	2	0	0	100.1	102	51	51	9	38	90	3	0	7	1.40	9.15	0.81	3.41	8.07	4.57	2.37
2025	Wichita Wind Surge	Tex2	AA	MIN	46	23	114	7	5	3.12	24	11	0	0	13	0	0	80.2	70	42	28	6	24	95	4	0	8	1.17	7.81	0.67	2.68	10.60	4.69	3.96
2025	St. Paul Saints	IL2	AAA	MIN	60	23	108*	0	5	6.66	7	4	0	0	3	0	0	25.2	26	20	19	1	13	33	2	0	3	1.52	9.12	0.35	4.56	11.57	7.01	2.54
2026	St. Paul Saints	IL2	AAA	MIN	60	24	104	2	4	5.91	24	14	0	0	10	0	0	64.0	63	43	42	14	34	74	3	3	4	1.52	8.86	1.97	4.78	10.41	6.05	2.18
2026	Buffalo Bisons	IL2	AAA	TOR	16	24	104	0	0	7.66	8	5	0	0	3	1	0	22.1	28	20	19	3	17	21	1	0	3	2.01	11.28	1.21	6.85	8.46	8.06	1.24
2026	Toronto Blue Jays	AL	MLB	TOR	65	24		0	0	0.00	1	0	0	0	1	0	0	4.0	2	2	0	0	2	5	0	0	0	1.00	4.50	0.00	4.50	11.25	4.50	2.50
2026	Minnesota Twins	AL	MLB	MIN	71	24		0	1	4.15	3	0	0	0	3	2	0	4.1	3	2	2	1	4	2	0	0	0	1.62	6.23	2.08	8.31	4.15	4.15	0.50
Tot:	MLB (1 yrs)		MLB					0	1	2.16	4	0	0	0	4	2	0	8.1	5	4	2	1	6	7	0	0	0	1.32	5.40	1.08	6.48	7.56	4.32	1.17
Tot:	AL (1 yrs)		AL					0	1	2.16	4	0	0	0	4	2	0	8.1	5	4	2	1	6	7	0	0	0	1.32	5.40	1.08	6.48	7.56	4.32	1.17
Tot:	Minors (5 yrs)		Minors					19	21	4.74	100	67	1	0	33	1	0	353.1	343	205	186	37	150	376	16	4	35	1.40	8.74	0.94	3.82	9.58	5.22	2.51
Tot:	Rk (2 yrs)		Rk					0	3	5.40	8	6	0	0	2	0	0	25.0	30	17	15	3	10	29	2	0	6	1.60	10.80	1.08	3.60	10.44	6.12	2.90
Tot:	A (1 yrs)		A					2	1	2.97	6	6	1	0	0	0	0	30.1	18	10	10	1	13	30	0	1	3	1.02	5.34	0.30	3.86	8.90	2.97	2.31
Tot:	A+ (2 yrs)		A+					8	3	4.53	23	21	0	0	2	0	0	105.1	108	53	53	9	39	94	4	0	8	1.40	9.23	0.77	3.33	8.03	4.53	2.41
Tot:	AA (1 yrs)		AA					7	5	3.12	24	11	0	0	13	0	0	80.2	70	42	28	6	24	95	4	0	8	1.17	7.81	0.67	2.68	10.60	4.69	3.96
Tot:	AAA (2 yrs)		AAA					2	9	6.43	39	23	0	0	16	1	0	112.0	117	83	80	18	64	128	6	3	10	1.62	9.40	1.45	5.14	10.29	6.67	2.00
Tot:	College (2 yrs)		College					13	6	4.35	25	24	5	0	1	0	0	134.1	122	81	65	12	69	165	0	0	0	1.42	8.17	0.80	4.62	11.05	5.43	2.39
Avg:	MLB - 162 Inning avg		MLB					🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	162	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒
Avg:	Minors - 162 Inning avg		Minors					🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	162	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒
Avg:	College - 162 Inning avg		College					🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	162	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒	🔒

Strikeouts	Walks	Hittable	SO/BB	vs Power	Durability	Team Success
51	74	44	72	44	60	.000

Prospect Rankings

Scouting Grades

Pitching Statistics

Talent Ratings

TBC Newsletter

TBC Premium