Pitching

Keyner Martinez

San Francisco Giants (A)

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Age: 22

Bats/Throws: R/R

6'1" / 209

DOB: 8/16/2004

(22 years, 18 days)

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Preseason ProjectionsIn-Season ProjectionsMinor Leagues

Season	Team	Level	Age	W	L	SV	G	GS	IP	divider	K/9	BB/9	HR/9	BABIP	LOB%	GB%	HR/FB	divider	vFA	divider	ERA	xERA	FIP	xFIP	WAR
2024	SFG	CPX	19	1	1	3	19	0	32.2		6.34	4.41	0.55	.258	71.8%	47.3%	6.7%				3.03		5.83	5.90
2025	SFG	CPX	20	3	1	2	15	8	47.1		12.74	1.90	0.19	.380	77.9%	47.2%	2.5%				1.90		2.70	3.18
2025	SFG	A	20	2	1	0	6	3	22.0		12.27	4.50	0.82	.358	78.8%	51.9%	11.8%				2.86		3.96	3.45
2025	SFG	MiLB	20	5	2	2	21	11	69.1		12.59	2.73	0.39	.373	78.2%	48.8%	5.3%				2.21		3.10	3.27
2026	Steamer	PROJ	21	0	0	0	0	0	1.0		5.80	4.74	1.30	.299	69.1%	44.2%					5.41		5.43	5.38	0.0
2026	OOPSY	PROJ	21	0	0	0	1	1	2.9		6.95	3.96	1.07	.293	67.1%						4.65		4.61		0.0
2026	SFG	A	21	4	5	0	21	21	88.2		13.09	4.57	1.12	.309	62.1%	37.2%	15.1%				4.87		4.83	4.56
2026	Steamer	ROS	21	0	0	0	0	0	1.0		6.30	5.12	1.21	.289	70.4%						5.07		5.29		0.0
2026	OOPSY	ROS	21	0	0	0	1	1	3.7		7.57	4.62	1.17	.288	67.9%						4.80		4.84		0.0

Season	Team	Level	Age	W	L	SV	G	GS	IP	divider	K/9	BB/9	HR/9	BABIP	LOB%	GB%	HR/FB	divider	vFA	divider	ERA	xERA	FIP	xFIP	WAR
2024	SFG	CPX	19	1	1	3	19	0	32.2		6.34	4.41	0.55	.258	71.8%	47.3%	6.7%				3.03		5.83	5.90
2025	SFG	CPX	20	3	1	2	15	8	47.1		12.74	1.90	0.19	.380	77.9%	47.2%	2.5%				1.90		2.70	3.18
2025	SFG	A	20	2	1	0	6	3	22.0		12.27	4.50	0.82	.358	78.8%	51.9%	11.8%				2.86		3.96	3.45
2025	SFG	MiLB	20	5	2	2	21	11	69.1		12.59	2.73	0.39	.373	78.2%	48.8%	5.3%				2.21		3.10	3.27
2026	Steamer	PROJ	21	0	0	0	0	0	1.0		5.80	4.74	1.30	.299	69.1%	44.2%					5.41		5.43	5.38	0.0
2026	OOPSY	PROJ	21	0	0	0	1	1	2.9		6.95	3.96	1.07	.293	67.1%						4.65		4.61		0.0
2026	SFG	A	21	4	5	0	21	21	88.2		13.09	4.57	1.12	.309	62.1%	37.2%	15.1%				4.87		4.83	4.56
2026	Steamer	ROS	21	0	0	0	0	0	1.0		6.30	5.12	1.21	.289	70.4%						5.07		5.29		0.0
2026	OOPSY	ROS	21	0	0	0	1	1	3.7		7.57	4.62	1.17	.288	67.9%						4.80		4.84		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	SFG	CPX	1	1	3.03	19	0		0	0	3	0	2	32.2	141	27	15	11	2	16	0	3	4	1	23
2025	SFG	CPX	3	1	1.90	15	8		0	0	2	0	0	47.1	188	42	13	10	1	10	0	2	2	0	67
2025	SFG	A	2	1	2.86	6	3		0	0	0	0	0	22.0	96	21	9	7	2	11	0	0	1	0	30
2025	SFG	MiLB	5	2	2.21	21	11		0	0	2	0	0	69.1	284	63	22	17	3	21	0	2	3	0	97
2026	Steamer	PROJ	0	0	5.41	0	0	0	0	0	0	0		1.0	5	1	1	1	0	1	0	0			1
2026	OOPSY	PROJ	0	0	4.65	1	1	0			0	0		2.9	12	3	2	2	0	1	0	0			2
2026	SFG	A	4	5	4.87	21	21		0	0	0	0	0	88.2	379	69	55	48	11	45	0	6	4	2	129
2026	Steamer	ROS	0	0	5.07	0	0	0	0	0	0	0		1.0	5	1	1	1	0	1		0			1
2026	OOPSY	ROS	0	0	4.80	1	1	0			0	0		3.7	16	3	2	2	0	2	0	0			3

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	SFG	CPX	1	1	3.03	19	0		0	0	3	0	2	32.2	141	27	15	11	2	16	0	3	4	1	23
2025	SFG	CPX	3	1	1.90	15	8		0	0	2	0	0	47.1	188	42	13	10	1	10	0	2	2	0	67
2025	SFG	A	2	1	2.86	6	3		0	0	0	0	0	22.0	96	21	9	7	2	11	0	0	1	0	30
2025	SFG	MiLB	5	2	2.21	21	11		0	0	2	0	0	69.1	284	63	22	17	3	21	0	2	3	0	97
2026	Steamer	PROJ	0	0	5.41	0	0	0	0	0	0	0		1.0	5	1	1	1	0	1	0	0			1
2026	OOPSY	PROJ	0	0	4.65	1	1	0			0	0		2.9	12	3	2	2	0	1	0	0			2
2026	SFG	A	4	5	4.87	21	21		0	0	0	0	0	88.2	379	69	55	48	11	45	0	6	4	2	129
2026	Steamer	ROS	0	0	5.07	0	0	0	0	0	0	0		1.0	5	1	1	1	0	1		0			1
2026	OOPSY	ROS	0	0	4.80	1	1	0			0	0		3.7	16	3	2	2	0	2	0	0			3

Preseason ProjectionsIn-Season ProjectionsMinor LeaguesAverages

Season	Team	Level	K/9	BB/9	K/BB	HR/9	divider	K%	BB%	K-BB%	divider	AVG	WHIP	BABIP	LOB%	divider	ERA-	FIP-	divider	FIP
2024	SFG	CPX	6.34	4.41	1.44	0.55		16.3%	11.3%	5.0%		.221	1.32	.258	71.8%		56	107		5.83
2025	SFG	CPX	12.74	1.90	6.70	0.19		35.6%	5.3%	30.3%		.239	1.10	.380	77.9%		37	53		2.70
2025	SFG	A	12.27	4.50	2.73	0.82		31.3%	11.5%	19.8%		.247	1.45	.358	78.8%		62	85		3.96
2025	SFG	MiLB	12.59	2.73	4.62	0.39		34.2%	7.4%	26.8%		.241	1.21	.373	78.2%		45	63		3.10
2026	Steamer	PROJ	5.80	4.74	1.22	1.30		14.1%	11.5%	2.6%		.276	1.64	.299	69.1%					5.43
2026	OOPSY	PROJ	6.95	3.96	1.75	1.07		18.5%	10.6%	8.0%		.254	1.38	.293	67.1%					4.61
2026	SFG	A	13.09	4.57	2.87	1.12		34.0%	11.9%	22.2%		.210	1.29	.309	62.1%		86	85		4.83
2026	Steamer	ROS	6.30	5.12	1.23	1.21		15.5%	12.6%	2.9%		.262	1.59	.289	70.4%					5.29
2026	OOPSY	ROS	7.57	4.62	1.64	1.17		19.8%	12.0%	7.7%		.248	1.43	.288	67.9%					4.84

Season	Team	Level	K/9	BB/9	K/BB	HR/9	divider	K%	BB%	K-BB%	divider	AVG	WHIP	BABIP	LOB%	divider	ERA-	FIP-	divider	FIP
2024	SFG	CPX	6.34	4.41	1.44	0.55		16.3%	11.3%	5.0%		.221	1.32	.258	71.8%		56	107		5.83
2025	SFG	CPX	12.74	1.90	6.70	0.19		35.6%	5.3%	30.3%		.239	1.10	.380	77.9%		37	53		2.70
2025	SFG	A	12.27	4.50	2.73	0.82		31.3%	11.5%	19.8%		.247	1.45	.358	78.8%		62	85		3.96
2025	SFG	MiLB	12.59	2.73	4.62	0.39		34.2%	7.4%	26.8%		.241	1.21	.373	78.2%		45	63		3.10
2026	Steamer	PROJ	5.80	4.74	1.22	1.30		14.1%	11.5%	2.6%		.276	1.64	.299	69.1%					5.43
2026	OOPSY	PROJ	6.95	3.96	1.75	1.07		18.5%	10.6%	8.0%		.254	1.38	.293	67.1%					4.61
2026	SFG	A	13.09	4.57	2.87	1.12		34.0%	11.9%	22.2%		.210	1.29	.309	62.1%		86	85		4.83
2026	Steamer	ROS	6.30	5.12	1.23	1.21		15.5%	12.6%	2.9%		.262	1.59	.289	70.4%					5.29
2026	OOPSY	ROS	7.57	4.62	1.64	1.17		19.8%	12.0%	7.7%		.248	1.43	.288	67.9%					4.84