Pitching

Yermain Ruiz

Boston Red Sox (A)

Age: 20

Bats/Throws: R/R

5'11" / 160

DOB: 11/27/2005

(20 years, 9 months, 18 days)

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Preseason ProjectionsIn-Season ProjectionsMinor Leagues

Season	Team	Level	Age	W	L	SV	G	GS	IP	K/9	BB/9	HR/9	BABIP	LOB%	GB%	HR/FB	ERA	FIP	xFIP	WAR
2024	BOS	DSL	18	3	1	0	11	11	45.2	7.29	2.96	0.59	.203	78.4%	44.1%	6.4%	1.77	4.39	4.12
2025	BOS	CPX	19	3	1	1	12	5	42.0	9.64	3.21	0.00	.328	65.5%	44.3%	0.0%	2.79	2.64	3.37
2026	Steamer	PROJ	20	0	0	0	0	0	1.0	4.32	6.64	1.59	.304	66.4%	42.1%		7.00	6.82	6.58	0.0
2026	OOPSY	PROJ	20	0	0	0	1	1	3.5	4.81	4.03	1.38	.300	61.0%			5.95	5.55		0.0
2026	BOS	CPX	20	1	1	0	5	1	13.1	13.50	4.73	2.70	.467	74.8%	35.3%	26.7%	7.43	7.16	4.76
2026	BOS	A	20	3	4	2	17	0	42.0	10.50	5.14	0.43	.387	55.3%	38.3%	4.4%	7.29	4.02	4.90
2026	BOS	MiLB	20	4	5	2	22	1	55.1	11.22	5.04	0.98	.403	59.6%	37.7%	10.0%	7.32	4.77	4.87
2026	Steamer	ROS	20	0	0	0	1	0	1.0	5.64	6.03	1.42	.301	68.2%			6.12	6.07		0.0
2026	OOPSY	ROS	20	0	0	0	1	1	2.8	5.80	4.61	1.49	.294	65.7%			5.80	5.70		0.0

Season	Team	Level	Age	W	L	SV	G	GS	IP	K/9	BB/9	HR/9	BABIP	LOB%	GB%	HR/FB	ERA	FIP	xFIP	WAR
2024	BOS	DSL	18	3	1	0	11	11	45.2	7.29	2.96	0.59	.203	78.4%	44.1%	6.4%	1.77	4.39	4.12
2025	BOS	CPX	19	3	1	1	12	5	42.0	9.64	3.21	0.00	.328	65.5%	44.3%	0.0%	2.79	2.64	3.37
2026	Steamer	PROJ	20	0	0	0	0	0	1.0	4.32	6.64	1.59	.304	66.4%	42.1%		7.00	6.82	6.58	0.0
2026	OOPSY	PROJ	20	0	0	0	1	1	3.5	4.81	4.03	1.38	.300	61.0%			5.95	5.55		0.0
2026	BOS	CPX	20	1	1	0	5	1	13.1	13.50	4.73	2.70	.467	74.8%	35.3%	26.7%	7.43	7.16	4.76
2026	BOS	A	20	3	4	2	17	0	42.0	10.50	5.14	0.43	.387	55.3%	38.3%	4.4%	7.29	4.02	4.90
2026	BOS	MiLB	20	4	5	2	22	1	55.1	11.22	5.04	0.98	.403	59.6%	37.7%	10.0%	7.32	4.77	4.87
2026	Steamer	ROS	20	0	0	0	1	0	1.0	5.64	6.03	1.42	.301	68.2%			6.12	6.07		0.0
2026	OOPSY	ROS	20	0	0	0	1	1	2.8	5.80	4.61	1.49	.294	65.7%			5.80	5.70		0.0

Preseason ProjectionsIn-Season ProjectionsMinor Leagues

Season	Team	Level	W	L	ERA	G	GS	QS	CG	ShO	SV	HLD	BS	IP	TBF	H	R	ER	HR	BB	IBB	HBP	WP	BK	SO
2024	BOS	DSL	3	1	1.77	11	11		0	0	0	0	0	45.2	176	27	13	9	3	15	0	3	2	0	37
2025	BOS	CPX	3	1	2.79	12	5		0	0	1	0	0	42.0	178	38	19	13	0	15	0	2	4	2	45
2026	Steamer	PROJ	0	0	7.00	0	0	0	0	0	0	0		1.0	5	1	1	1	0	1	0	0			0
2026	OOPSY	PROJ	0	0	5.95	1	1	0			0	0		3.5	15	4	3	2	1	2	0	0			2
2026	BOS	CPX	1	1	7.43	5	1		0	0	0	1	0	13.1	63	18	11	11	4	7	0	2	0	0	20
2026	BOS	A	3	4	7.29	17	0		0	0	2	1	0	42.0	199	48	36	34	2	24	0	5	1	1	49
2026	BOS	MiLB	4	5	7.32	22	1		0	0	2	2	0	55.1	262	66	47	45	6	31	0	7	1	1	69
2026	Steamer	ROS	0	0	6.12	1	0	0	0	0	0	0		1.0	5	1	1	1	0	1		0			1
2026	OOPSY	ROS	0	0	5.80	1	1	0			0	0		2.8	13	3	2	2	0	1	0	0			2

Season	Team	Level	W	L	ERA	G	GS	QS	CG	ShO	SV	HLD	BS	IP	TBF	H	R	ER	HR	BB	IBB	HBP	WP	BK	SO
2024	BOS	DSL	3	1	1.77	11	11		0	0	0	0	0	45.2	176	27	13	9	3	15	0	3	2	0	37
2025	BOS	CPX	3	1	2.79	12	5		0	0	1	0	0	42.0	178	38	19	13	0	15	0	2	4	2	45
2026	Steamer	PROJ	0	0	7.00	0	0	0	0	0	0	0		1.0	5	1	1	1	0	1	0	0			0
2026	OOPSY	PROJ	0	0	5.95	1	1	0			0	0		3.5	15	4	3	2	1	2	0	0			2
2026	BOS	CPX	1	1	7.43	5	1		0	0	0	1	0	13.1	63	18	11	11	4	7	0	2	0	0	20
2026	BOS	A	3	4	7.29	17	0		0	0	2	1	0	42.0	199	48	36	34	2	24	0	5	1	1	49
2026	BOS	MiLB	4	5	7.32	22	1		0	0	2	2	0	55.1	262	66	47	45	6	31	0	7	1	1	69
2026	Steamer	ROS	0	0	6.12	1	0	0	0	0	0	0		1.0	5	1	1	1	0	1		0			1
2026	OOPSY	ROS	0	0	5.80	1	1	0			0	0		2.8	13	3	2	2	0	1	0	0			2

Preseason ProjectionsIn-Season ProjectionsMinor LeaguesAverages

Season	Team	Level	K/9	BB/9	K/BB	HR/9	K%	BB%	K-BB%	AVG	WHIP	BABIP	LOB%	ERA-	FIP-	FIP
2024	BOS	DSL	7.29	2.96	2.47	0.59	21.0%	8.5%	12.5%	.171	0.92	.203	78.4%	37	92	4.39
2025	BOS	CPX	9.64	3.21	3.00	0.00	25.3%	8.4%	16.9%	.236	1.26	.328	65.5%	61	61	2.64
2026	Steamer	PROJ	4.32	6.64	0.65	1.59	9.9%	15.1%	-5.3%	.299	1.96	.304	66.4%			6.82
2026	OOPSY	PROJ	4.81	4.03	1.19	1.38	12.6%	10.6%	2.1%	.286	1.52	.300	61.0%			5.55
2026	BOS	CPX	13.50	4.73	2.86	2.70	31.7%	11.1%	20.6%	.333	1.88	.467	74.8%	121	122	7.16
2026	BOS	A	10.50	5.14	2.04	0.43	24.6%	12.1%	12.6%	.282	1.71	.387	55.3%	148	85	4.02
2026	BOS	MiLB	11.22	5.04	2.23	0.98	26.3%	11.8%	14.5%	.295	1.75	.403	59.6%	141	94	4.77
2026	Steamer	ROS	5.64	6.03	0.94	1.42	13.2%	14.1%	-0.9%	.282	1.80	.301	68.2%			6.07
2026	OOPSY	ROS	5.80	4.61	1.26	1.49	14.2%	11.3%	2.9%	.276	1.61	.294	65.7%			5.70

Season	Team	Level	K/9	BB/9	K/BB	HR/9	K%	BB%	K-BB%	AVG	WHIP	BABIP	LOB%	ERA-	FIP-	FIP
2024	BOS	DSL	7.29	2.96	2.47	0.59	21.0%	8.5%	12.5%	.171	0.92	.203	78.4%	37	92	4.39
2025	BOS	CPX	9.64	3.21	3.00	0.00	25.3%	8.4%	16.9%	.236	1.26	.328	65.5%	61	61	2.64
2026	Steamer	PROJ	4.32	6.64	0.65	1.59	9.9%	15.1%	-5.3%	.299	1.96	.304	66.4%			6.82
2026	OOPSY	PROJ	4.81	4.03	1.19	1.38	12.6%	10.6%	2.1%	.286	1.52	.300	61.0%			5.55
2026	BOS	CPX	13.50	4.73	2.86	2.70	31.7%	11.1%	20.6%	.333	1.88	.467	74.8%	121	122	7.16
2026	BOS	A	10.50	5.14	2.04	0.43	24.6%	12.1%	12.6%	.282	1.71	.387	55.3%	148	85	4.02
2026	BOS	MiLB	11.22	5.04	2.23	0.98	26.3%	11.8%	14.5%	.295	1.75	.403	59.6%	141	94	4.77
2026	Steamer	ROS	5.64	6.03	0.94	1.42	13.2%	14.1%	-0.9%	.282	1.80	.301	68.2%			6.07
2026	OOPSY	ROS	5.80	4.61	1.26	1.49	14.2%	11.3%	2.9%	.276	1.61	.294	65.7%			5.70