Ryan Zeferjahn

Chicago Cubs

Age: 28

Bats/Throws: R/R

6'5" / 209

DOB: 2/28/1998

(28 years, 7 months)

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Partial SeasonsPreseason ProjectionsIn-Season ProjectionsMinor LeaguesSpring TrainingMLB Regular Season

Season	Team	Level	Age	W	L	SV	G	GS	IP	K/9	BB/9	HR/9	BABIP	LOB%	GB%	HR/FB	vFA	ERA	xERA	FIP	xFIP	WAR
2019	BOS	A-	21	0	2	0	12	12	22.0	12.68	4.91	0.82	.415	74.6%	38.9%	10.0%		4.50		3.81	3.31
2021	BOS	CPX	23	0	0	0	4	4	14.0	11.57	1.93	1.29	.313	75.8%	39.4%	14.3%		3.21		4.29	3.54
2021	BOS	A	23	1	4	0	12	12	41.2	8.86	3.24	0.43	.381	43.2%	39.7%	4.8%		6.91		3.86	4.59
2021	BOS	MiLB	23	1	4	0	16	16	55.2	9.54	2.91	0.65	.367	48.5%	39.6%	7.1%		5.98		3.97	4.33
2022	BOS	A+	24	2	4	1	28	5	60.2	10.83	4.30	0.89	.342	62.4%	37.6%	9.7%		5.79		4.37	4.59
2022	BOS	AA	24	3	0	0	6	0	10.2	5.91	3.38	0.84	.083	100.0%	40.0%	7.7%		0.84		4.73	5.40
2022	BOS	MiLB	24	5	4	1	34	5	71.1	10.09	4.16	0.88	.307	65.5%	37.9%	9.3%		5.05		4.42	4.71
2023	BOS	A	25	1	0	0	2	1	3.0	6.00	0.00	0.00	.300	100.0%	50.0%	0.0%		0.00		2.37	3.06
2023	BOS	AA	25	0	4	2	34	0	43.0	14.23	8.37	1.47	.313	75.1%	33.0%	16.3%		5.02		5.44	4.77
2023	BOS	MiLB	25	1	4	2	36	1	46.0	13.70	7.83	1.37	.312	76.2%	34.7%	15.6%		4.70		5.24	4.65
2023	BOS	ST	25	1	0	0	1	0	1.0	9.00	0.00	0.00	.000	100.0%	50.0%	0.0%		0.00		1.81	3.59
2024	BOS	AA	26	1	0	3	7	0	13.2	14.49	1.98	0.00	.310	83.3%	25.9%	0.0%		0.00		0.82	1.81
2024	BOS	AAA	26	0	3	4	18	1	24.2	11.31	6.20	1.09	.293	64.4%	36.2%	13.0%		5.47	4.45	5.43	5.53
2024	LAA	AAA	26	0	0	0	5	0	7.2	9.39	1.17	1.17	.222	87.0%	31.6%	20.0%		2.35	3.17	3.83	3.33
2024	---	MiLB	26	1	3	7	30	1	46.0	11.93	4.11	0.78	.286	70.4%	32.7%	10.3%		3.33	4.18	3.80	4.06
2024	BOS	ST	26	0	0	0	4	0	3.0	12.00	15.00	0.00	.600	45.5%	20.0%	0.0%		18.00		6.07	9.49
2024	LAA	MLB	26	0	0	0	12	0	17.0	9.53	3.18	0.00	.184	73.3%	39.5%	0.0%	97.5	2.12	1.66	2.46	4.15	0.4
2025	LAA	ST	27	0	0	0	8	0	9.0	8.00	4.00	0.00	.250	100.0%	41.7%	0.0%		0.00		3.29	5.26
2025	LAA	MLB	27	6	5	2	62	1	57.0	11.53	5.53	1.89	.278	80.1%	36.2%	19.4%	97.5	4.74	4.34	5.36	4.30	-0.7
2026	LAA	ST	28	0	0	1	8	0	10.1	6.97	4.35	1.74	.214	71.4%	40.0%	13.3%		5.23		6.36	6.56
2026	FGDC	PROJ	28	3	3	0	52	0	52.0	9.80	4.62	1.19	.287	71.1%				4.45		4.47		0.0
2026	Steamer	PROJ	28	2	3	0	52	0	52.0	9.62	4.49	1.24	.290	73.2%	37.4%			4.32		4.46	4.43	0.0
2026	ZiPS	PROJ	28	4	4	0	50	1	55.0	9.98	4.75	1.15	.283	69.0%				4.58		4.48		0.0
2026	ZiPS DC	PROJ	28	4	4	0	52	0	52.0	9.98	4.75	1.15	.283	69.0%				4.58		4.48		0.0
2026	ATC	PROJ	28	3	3	1	58	0	60.0	9.89	4.80	1.29	.283	72.2%				4.40		4.61		-0.1
2026	THE BAT	PROJ	28	2	2	1	58	0	60.0	10.38	4.64	1.25	.286	71.3%				4.47		4.39		0.1
2026	THE BAT X	PROJ	28	2	2	1	58	0	60.0	10.21	4.60	1.10	.283	72.3%				4.18		4.19		0.3
2026	OOPSY	PROJ	28	3	3	0	52	0	52.0	10.71	4.73	1.18	.273	75.8%				3.82		4.20		0.1
2026	2 Tms	MLB	28	4	4	7	65	0	69.2	12.14	5.17	0.90	.273	73.7%	44.7%	12.3%	97.6	3.88	3.09	3.82	3.75	0.5
2026	LAA	MLB	28	4	3	4	45	0	51.2	13.06	5.57	0.87	.240	74.6%	41.7%	11.4%	97.5	3.66	2.96	3.78	3.81	0.4
2026	CHC	MLB	28	0	1	3	20	0	18.0	9.50	4.00	1.00	.340	71.4%	51.0%	15.4%	97.6	4.50	3.49	3.93	3.58	0.2
2026	FGDC	ROS	28	5	4	4	75	0	75.0	10.77	4.90	0.99	.268	73.8%				3.71		4.04		0.4
Total	- - -	MLB		10	9	9	139	1	143.2	11.59	5.07	1.19	.265	76.3%	40.5%	13.8%	97.5	4.01	3.37	4.27	4.02	0.2

Season	Team	Level	Age	W	L	SV	G	GS	IP	K/9	BB/9	HR/9	BABIP	LOB%	GB%	HR/FB	vFA	ERA	xERA	FIP	xFIP	WAR
2019	BOS	A-	21	0	2	0	12	12	22.0	12.68	4.91	0.82	.415	74.6%	38.9%	10.0%		4.50		3.81	3.31
2021	BOS	CPX	23	0	0	0	4	4	14.0	11.57	1.93	1.29	.313	75.8%	39.4%	14.3%		3.21		4.29	3.54
2021	BOS	A	23	1	4	0	12	12	41.2	8.86	3.24	0.43	.381	43.2%	39.7%	4.8%		6.91		3.86	4.59
2021	BOS	MiLB	23	1	4	0	16	16	55.2	9.54	2.91	0.65	.367	48.5%	39.6%	7.1%		5.98		3.97	4.33
2022	BOS	A+	24	2	4	1	28	5	60.2	10.83	4.30	0.89	.342	62.4%	37.6%	9.7%		5.79		4.37	4.59
2022	BOS	AA	24	3	0	0	6	0	10.2	5.91	3.38	0.84	.083	100.0%	40.0%	7.7%		0.84		4.73	5.40
2022	BOS	MiLB	24	5	4	1	34	5	71.1	10.09	4.16	0.88	.307	65.5%	37.9%	9.3%		5.05		4.42	4.71
2023	BOS	A	25	1	0	0	2	1	3.0	6.00	0.00	0.00	.300	100.0%	50.0%	0.0%		0.00		2.37	3.06
2023	BOS	AA	25	0	4	2	34	0	43.0	14.23	8.37	1.47	.313	75.1%	33.0%	16.3%		5.02		5.44	4.77
2023	BOS	MiLB	25	1	4	2	36	1	46.0	13.70	7.83	1.37	.312	76.2%	34.7%	15.6%		4.70		5.24	4.65
2023	BOS	ST	25	1	0	0	1	0	1.0	9.00	0.00	0.00	.000	100.0%	50.0%	0.0%		0.00		1.81	3.59
2024	BOS	AA	26	1	0	3	7	0	13.2	14.49	1.98	0.00	.310	83.3%	25.9%	0.0%		0.00		0.82	1.81
2024	BOS	AAA	26	0	3	4	18	1	24.2	11.31	6.20	1.09	.293	64.4%	36.2%	13.0%		5.47	4.45	5.43	5.53
2024	LAA	AAA	26	0	0	0	5	0	7.2	9.39	1.17	1.17	.222	87.0%	31.6%	20.0%		2.35	3.17	3.83	3.33
2024	---	MiLB	26	1	3	7	30	1	46.0	11.93	4.11	0.78	.286	70.4%	32.7%	10.3%		3.33	4.18	3.80	4.06
2024	BOS	ST	26	0	0	0	4	0	3.0	12.00	15.00	0.00	.600	45.5%	20.0%	0.0%		18.00		6.07	9.49
2024	LAA	MLB	26	0	0	0	12	0	17.0	9.53	3.18	0.00	.184	73.3%	39.5%	0.0%	97.5	2.12	1.66	2.46	4.15	0.4
2025	LAA	ST	27	0	0	0	8	0	9.0	8.00	4.00	0.00	.250	100.0%	41.7%	0.0%		0.00		3.29	5.26
2025	LAA	MLB	27	6	5	2	62	1	57.0	11.53	5.53	1.89	.278	80.1%	36.2%	19.4%	97.5	4.74	4.34	5.36	4.30	-0.7
2026	LAA	ST	28	0	0	1	8	0	10.1	6.97	4.35	1.74	.214	71.4%	40.0%	13.3%		5.23		6.36	6.56
2026	FGDC	PROJ	28	3	3	0	52	0	52.0	9.80	4.62	1.19	.287	71.1%				4.45		4.47		0.0
2026	Steamer	PROJ	28	2	3	0	52	0	52.0	9.62	4.49	1.24	.290	73.2%	37.4%			4.32		4.46	4.43	0.0
2026	ZiPS	PROJ	28	4	4	0	50	1	55.0	9.98	4.75	1.15	.283	69.0%				4.58		4.48		0.0
2026	ZiPS DC	PROJ	28	4	4	0	52	0	52.0	9.98	4.75	1.15	.283	69.0%				4.58		4.48		0.0
2026	ATC	PROJ	28	3	3	1	58	0	60.0	9.89	4.80	1.29	.283	72.2%				4.40		4.61		-0.1
2026	THE BAT	PROJ	28	2	2	1	58	0	60.0	10.38	4.64	1.25	.286	71.3%				4.47		4.39		0.1
2026	THE BAT X	PROJ	28	2	2	1	58	0	60.0	10.21	4.60	1.10	.283	72.3%				4.18		4.19		0.3
2026	OOPSY	PROJ	28	3	3	0	52	0	52.0	10.71	4.73	1.18	.273	75.8%				3.82		4.20		0.1
2026	2 Tms	MLB	28	4	4	7	65	0	69.2	12.14	5.17	0.90	.273	73.7%	44.7%	12.3%	97.6	3.88	3.09	3.82	3.75	0.5
2026	LAA	MLB	28	4	3	4	45	0	51.2	13.06	5.57	0.87	.240	74.6%	41.7%	11.4%	97.5	3.66	2.96	3.78	3.81	0.4
2026	CHC	MLB	28	0	1	3	20	0	18.0	9.50	4.00	1.00	.340	71.4%	51.0%	15.4%	97.6	4.50	3.49	3.93	3.58	0.2
2026	FGDC	ROS	28	5	4	4	75	0	75.0	10.77	4.90	0.99	.268	73.8%				3.71		4.04		0.4
Total	- - -	MLB		10	9	9	139	1	143.2	11.59	5.07	1.19	.265	76.3%	40.5%	13.8%	97.5	4.01	3.37	4.27	4.02	0.2

Partial SeasonsPreseason ProjectionsIn-Season ProjectionsMinor LeaguesSpring TrainingMLB Regular Season

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
2019	BOS	A-	0	2	4.50	12	12		0	0	0	0	0	22.0	101	24	12	11	2	12	0	3	2	0	31
2021	BOS	CPX	0	0	3.21	4	4		0	0	0	0	0	14.0	56	12	6	5	2	3	0	1	2	0	18
2021	BOS	A	1	4	6.91	12	12		0	0	0	0	0	41.2	194	53	41	32	2	15	0	2	4	0	41
2021	BOS	MiLB	1	4	5.98	16	16		0	0	0	0	0	55.2	250	65	47	37	4	18	0	3	6	0	59
2022	BOS	A+	2	4	5.79	28	5		0	0	1	3	2	60.2	268	58	41	39	6	29	0	8	10	2	73
2022	BOS	AA	3	0	0.84	6	0		0	0	0	1	0	10.2	37	3	1	1	1	4	0	1	0	0	7
2022	BOS	MiLB	5	4	5.05	34	5		0	0	1	4	2	71.1	305	61	42	40	7	33	0	9	10	2	80
2023	BOS	A	1	0	0.00	2	1		0	0	0	0	0	3.0	12	3	0	0	0	0	0	0	0	0	2
2023	BOS	AA	0	4	5.02	34	0		0	0	2	6	2	43.0	204	33	27	24	7	40	0	6	4	0	68
2023	BOS	MiLB	1	4	4.70	36	1		0	0	2	6	2	46.0	216	36	27	24	7	40	0	6	4	0	70
2023	BOS	ST	1	0	0.00	1	0		0	0	0	0	0	1.0	3	0	0	0	0	0	0	0	0	0	1
2024	BOS	AA	1	0	0.00	7	0		0	0	3	1	0	13.2	54	9	2	0	0	3	0	0	1	0	22
2024	BOS	AAA	0	3	5.47	18	1		0	0	4	0	1	24.2	115	20	18	15	3	17	1	6	1	1	31
2024	LAA	AAA	0	0	2.35	5	0		0	0	0	0	0	7.2	28	5	2	2	1	1	0	0	0	0	8
2024	---	MiLB	1	3	3.33	30	1		0	0	7	1	1	46.0	197	34	22	17	4	21	1	6	2	1	61
2024	BOS	ST	0	0	18.00	4	0		0	0	0	1	0	3.0	19	6	6	6	0	5	0	0	0	0	4
2024	LAA	MLB	0	0	2.12	12	0	0	0	0	0	0	0	17.0	64	7	4	4	0	6	1	2	0	0	18
2025	LAA	ST	0	0	0.00	8	0		0	0	0	1	0	9.0	36	6	0	0	0	4	0	0	0	0	8
2025	LAA	MLB	6	5	4.74	62	1	0	0	0	2	17	5	57.0	257	49	31	30	12	35	3	4	3	0	73
2026	LAA	ST	0	0	5.23	8	0		0	0	1	1	1	10.1	44	8	6	6	2	5	0	1	1	0	8
2026	FGDC	PROJ	3	3	4.45	52	0	0			0	5		52.0	227	45	28	26	7	27		4			57
2026	Steamer	PROJ	2	3	4.32	52	0	0	0	0	0	5		52.0	227	46	27	25	7	26	2	3			56
2026	ZiPS	PROJ	4	4	4.58	50	1				0	5		55.0	241	46	30	28	7	29	2	6	4	1	61
2026	ZiPS DC	PROJ	4	4	4.58	52	0	0			0	5		52.0	228	43	28	26	7	27		6			58
2026	ATC	PROJ	3	3	4.40	58	0	0			1	14		60.0	263	52	32	29	9	32	2	4			66
2026	THE BAT	PROJ	2	2	4.47	58	0	0			1	5		60.0	263	51	32	30	8	31	2	4			69
2026	THE BAT X	PROJ	2	2	4.18	58	0	0			1	5		60.0	261	50	30	28	7	31	2	4			68
2026	OOPSY	PROJ	3	3	3.82	52	0	0			0	5		52.0	228	42	24	22	7	27		3			62
2026	2 Tms	MLB	4	4	3.88	65	0	0	0	0	7	14	4	69.2	304	49	33	30	7	40	5	9	4	0	94
2026	LAA	MLB	4	3	3.66	45	0	0	0	0	4	9	2	51.2	224	30	23	21	5	32	3	8	1	0	75
2026	CHC	MLB	0	1	4.50	20	0	0	0	0	3	5	2	18.0	80	19	10	9	2	8	2	1	3	0	19
2026	FGDC	ROS	5	4	3.71	75	0	0			4	5		75.0	319	55	34	31	8	41		7			90
Total	- - -	MLB	10	9	4.01	139	1	0	0	0	9	31	9	143.2	625	105	68	64	19	81	9	15	7	0	185

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
2019	BOS	A-	0	2	4.50	12	12		0	0	0	0	0	22.0	101	24	12	11	2	12	0	3	2	0	31
2021	BOS	CPX	0	0	3.21	4	4		0	0	0	0	0	14.0	56	12	6	5	2	3	0	1	2	0	18
2021	BOS	A	1	4	6.91	12	12		0	0	0	0	0	41.2	194	53	41	32	2	15	0	2	4	0	41
2021	BOS	MiLB	1	4	5.98	16	16		0	0	0	0	0	55.2	250	65	47	37	4	18	0	3	6	0	59
2022	BOS	A+	2	4	5.79	28	5		0	0	1	3	2	60.2	268	58	41	39	6	29	0	8	10	2	73
2022	BOS	AA	3	0	0.84	6	0		0	0	0	1	0	10.2	37	3	1	1	1	4	0	1	0	0	7
2022	BOS	MiLB	5	4	5.05	34	5		0	0	1	4	2	71.1	305	61	42	40	7	33	0	9	10	2	80
2023	BOS	A	1	0	0.00	2	1		0	0	0	0	0	3.0	12	3	0	0	0	0	0	0	0	0	2
2023	BOS	AA	0	4	5.02	34	0		0	0	2	6	2	43.0	204	33	27	24	7	40	0	6	4	0	68
2023	BOS	MiLB	1	4	4.70	36	1		0	0	2	6	2	46.0	216	36	27	24	7	40	0	6	4	0	70
2023	BOS	ST	1	0	0.00	1	0		0	0	0	0	0	1.0	3	0	0	0	0	0	0	0	0	0	1
2024	BOS	AA	1	0	0.00	7	0		0	0	3	1	0	13.2	54	9	2	0	0	3	0	0	1	0	22
2024	BOS	AAA	0	3	5.47	18	1		0	0	4	0	1	24.2	115	20	18	15	3	17	1	6	1	1	31
2024	LAA	AAA	0	0	2.35	5	0		0	0	0	0	0	7.2	28	5	2	2	1	1	0	0	0	0	8
2024	---	MiLB	1	3	3.33	30	1		0	0	7	1	1	46.0	197	34	22	17	4	21	1	6	2	1	61
2024	BOS	ST	0	0	18.00	4	0		0	0	0	1	0	3.0	19	6	6	6	0	5	0	0	0	0	4
2024	LAA	MLB	0	0	2.12	12	0	0	0	0	0	0	0	17.0	64	7	4	4	0	6	1	2	0	0	18
2025	LAA	ST	0	0	0.00	8	0		0	0	0	1	0	9.0	36	6	0	0	0	4	0	0	0	0	8
2025	LAA	MLB	6	5	4.74	62	1	0	0	0	2	17	5	57.0	257	49	31	30	12	35	3	4	3	0	73
2026	LAA	ST	0	0	5.23	8	0		0	0	1	1	1	10.1	44	8	6	6	2	5	0	1	1	0	8
2026	FGDC	PROJ	3	3	4.45	52	0	0			0	5		52.0	227	45	28	26	7	27		4			57
2026	Steamer	PROJ	2	3	4.32	52	0	0	0	0	0	5		52.0	227	46	27	25	7	26	2	3			56
2026	ZiPS	PROJ	4	4	4.58	50	1				0	5		55.0	241	46	30	28	7	29	2	6	4	1	61
2026	ZiPS DC	PROJ	4	4	4.58	52	0	0			0	5		52.0	228	43	28	26	7	27		6			58
2026	ATC	PROJ	3	3	4.40	58	0	0			1	14		60.0	263	52	32	29	9	32	2	4			66
2026	THE BAT	PROJ	2	2	4.47	58	0	0			1	5		60.0	263	51	32	30	8	31	2	4			69
2026	THE BAT X	PROJ	2	2	4.18	58	0	0			1	5		60.0	261	50	30	28	7	31	2	4			68
2026	OOPSY	PROJ	3	3	3.82	52	0	0			0	5		52.0	228	42	24	22	7	27		3			62
2026	2 Tms	MLB	4	4	3.88	65	0	0	0	0	7	14	4	69.2	304	49	33	30	7	40	5	9	4	0	94
2026	LAA	MLB	4	3	3.66	45	0	0	0	0	4	9	2	51.2	224	30	23	21	5	32	3	8	1	0	75
2026	CHC	MLB	0	1	4.50	20	0	0	0	0	3	5	2	18.0	80	19	10	9	2	8	2	1	3	0	19
2026	FGDC	ROS	5	4	3.71	75	0	0			4	5		75.0	319	55	34	31	8	41		7			90
Total	- - -	MLB	10	9	4.01	139	1	0	0	0	9	31	9	143.2	625	105	68	64	19	81	9	15	7	0	185

Partial SeasonsPreseason ProjectionsIn-Season ProjectionsMinor LeaguesSpring TrainingMLB Regular SeasonAverages

Season	Team	Level	K/9	BB/9	K/BB	HR/9	K%	BB%	K-BB%	AVG	WHIP	BABIP	LOB%	ERA-	FIP-	FIP
2019	BOS	A-	12.68	4.91	2.58	0.82	30.7%	11.9%	18.8%	.279	1.64	.415	74.6%	122	108	3.81
2021	BOS	CPX	11.57	1.93	6.00	1.29	32.1%	5.4%	26.8%	.231	1.07	.313	75.8%	60	85	4.29
2021	BOS	A	8.86	3.24	2.73	0.43	21.1%	7.7%	13.4%	.299	1.63	.381	43.2%	142	83	3.86
2021	BOS	MiLB	9.54	2.91	3.28	0.65	23.6%	7.2%	16.4%	.284	1.49	.367	48.5%	122	84	3.97
2022	BOS	A+	10.83	4.30	2.52	0.89	27.2%	10.8%	16.4%	.251	1.43	.342	62.4%	125	97	4.37
2022	BOS	AA	5.91	3.38	1.75	0.84	18.9%	10.8%	8.1%	.094	0.66	.083	100.0%	19	109	4.73
2022	BOS	MiLB	10.09	4.16	2.42	0.88	26.2%	10.8%	15.4%	.232	1.32	.307	65.5%	110	98	4.42
2023	BOS	A	6.00	0.00	2.00	0.00	16.7%	0.0%	16.7%	.250	1.00	.300	100.0%	0	57	2.37
2023	BOS	AA	14.23	8.37	1.70	1.47	33.3%	19.6%	13.7%	.209	1.70	.313	75.1%	115	128	5.44
2023	BOS	MiLB	13.70	7.83	1.75	1.37	32.4%	18.5%	13.9%	.212	1.65	.312	76.2%	108	123	5.24
2023	BOS	ST	9.00	0.00	1.00	0.00	33.3%	0.0%	33.3%	.000	0.00	.000	100.0%	0	38	1.81
2024	BOS	AA	14.49	1.98	7.33	0.00	40.7%	5.6%	35.2%	.176	0.88	.310	83.3%	0	21	0.82
2024	BOS	AAA	11.31	6.20	1.82	1.09	27.0%	14.8%	12.2%	.217	1.50	.293	64.4%	112	112	5.43
2024	LAA	AAA	9.39	1.17	8.00	1.17	28.6%	3.6%	25.0%	.185	0.78	.222	87.0%	44	74	3.83
2024	---	MiLB	11.93	4.11	2.90	0.78	31.0%	10.7%	20.3%	.200	1.20	.286	70.4%	68	79	3.80
2024	BOS	ST	12.00	15.00	0.80	0.00	21.1%	26.3%	-5.3%	.429	3.67	.600	45.5%	368	131	6.07
2024	LAA	MLB	9.53	3.18	3.00	0.00	28.1%	9.4%	18.8%	.125	0.76	.184	73.3%	53	60	2.46
2024			8.60	3.12	2.76	1.14	22.6%	8.2%	14.4%	.241	1.27	.289	72.1%			4.11
2025	LAA	ST	8.00	4.00	2.00	0.00	22.2%	11.1%	11.1%	.188	1.11	.250	100.0%	0	69	3.29
2025	LAA	MLB	11.53	5.53	2.09	1.89	28.4%	13.6%	14.8%	.225	1.47	.278	80.1%	116	130	5.36
2025			8.49	3.21	2.64	1.18	22.2%	8.4%	13.8%	.242	1.29	.289	72.3%			4.22
2026	LAA	ST	6.97	4.35	1.60	1.74	18.2%	11.4%	6.8%	.211	1.26	.214	71.4%	104	131	6.36
2026	FGDC	PROJ	9.80	4.62	2.12	1.19	24.9%	11.7%	13.2%	.229	1.38	.287	71.1%			4.47
2026	Steamer	PROJ	9.62	4.49	2.14	1.24	24.5%	11.4%	13.1%	.235	1.39	.290	73.2%			4.46
2026	ZiPS	PROJ	9.98	4.75	2.10	1.15	25.3%	12.0%	13.3%	.223	1.36	.283	69.0%			4.48
2026	ZiPS DC	PROJ	9.98	4.75	2.10	1.15	25.3%	12.0%	13.3%	.223	1.36	.283	69.0%			4.48
2026	ATC	PROJ	9.89	4.80	2.06	1.29	25.1%	12.2%	12.9%	.228	1.39	.283	72.2%			4.61
2026	THE BAT	PROJ	10.38	4.64	2.24	1.25	26.4%	11.8%	14.6%	.225	1.37	.286	71.3%			4.39
2026	THE BAT X	PROJ	10.21	4.60	2.22	1.10	26.1%	11.8%	14.3%	.221	1.34	.283	72.3%			4.19
2026	OOPSY	PROJ	10.71	4.73	2.26	1.18	27.1%	12.0%	15.1%	.213	1.34	.273	75.8%			4.20
2026	2 Tms	MLB	12.14	5.17	2.35	0.90	30.9%	13.2%	17.8%	.192	1.28	.273	73.7%	94	93	3.82
2026	LAA	MLB	13.06	5.57	2.34	0.87	33.5%	14.3%	19.2%	.163	1.20	.240	74.6%	89	92	3.78
2026	CHC	MLB	9.50	4.00	2.38	1.00	23.8%	10.0%	13.7%	.268	1.50	.340	71.4%	110	95	3.93
2026			8.50	3.41	2.49	1.16	22.1%	8.9%	13.3%	.241	1.30	.288	72.3%			4.28
2026	FGDC	ROS	10.77	4.90	2.20	0.99	28.1%	12.8%	15.3%	.202	1.28	.268	73.8%			4.04
Total	- - -	MLB	11.59	5.07	2.28	1.19	29.6%	13.0%	16.6%	.198	1.29	.265	76.3%	98	104	4.27

Season	Team	Level	K/9	BB/9	K/BB	HR/9	K%	BB%	K-BB%	AVG	WHIP	BABIP	LOB%	ERA-	FIP-	FIP
2019	BOS	A-	12.68	4.91	2.58	0.82	30.7%	11.9%	18.8%	.279	1.64	.415	74.6%	122	108	3.81
2021	BOS	CPX	11.57	1.93	6.00	1.29	32.1%	5.4%	26.8%	.231	1.07	.313	75.8%	60	85	4.29
2021	BOS	A	8.86	3.24	2.73	0.43	21.1%	7.7%	13.4%	.299	1.63	.381	43.2%	142	83	3.86
2021	BOS	MiLB	9.54	2.91	3.28	0.65	23.6%	7.2%	16.4%	.284	1.49	.367	48.5%	122	84	3.97
2022	BOS	A+	10.83	4.30	2.52	0.89	27.2%	10.8%	16.4%	.251	1.43	.342	62.4%	125	97	4.37
2022	BOS	AA	5.91	3.38	1.75	0.84	18.9%	10.8%	8.1%	.094	0.66	.083	100.0%	19	109	4.73
2022	BOS	MiLB	10.09	4.16	2.42	0.88	26.2%	10.8%	15.4%	.232	1.32	.307	65.5%	110	98	4.42
2023	BOS	A	6.00	0.00	2.00	0.00	16.7%	0.0%	16.7%	.250	1.00	.300	100.0%	0	57	2.37
2023	BOS	AA	14.23	8.37	1.70	1.47	33.3%	19.6%	13.7%	.209	1.70	.313	75.1%	115	128	5.44
2023	BOS	MiLB	13.70	7.83	1.75	1.37	32.4%	18.5%	13.9%	.212	1.65	.312	76.2%	108	123	5.24
2023	BOS	ST	9.00	0.00	1.00	0.00	33.3%	0.0%	33.3%	.000	0.00	.000	100.0%	0	38	1.81
2024	BOS	AA	14.49	1.98	7.33	0.00	40.7%	5.6%	35.2%	.176	0.88	.310	83.3%	0	21	0.82
2024	BOS	AAA	11.31	6.20	1.82	1.09	27.0%	14.8%	12.2%	.217	1.50	.293	64.4%	112	112	5.43
2024	LAA	AAA	9.39	1.17	8.00	1.17	28.6%	3.6%	25.0%	.185	0.78	.222	87.0%	44	74	3.83
2024	---	MiLB	11.93	4.11	2.90	0.78	31.0%	10.7%	20.3%	.200	1.20	.286	70.4%	68	79	3.80
2024	BOS	ST	12.00	15.00	0.80	0.00	21.1%	26.3%	-5.3%	.429	3.67	.600	45.5%	368	131	6.07
2024	LAA	MLB	9.53	3.18	3.00	0.00	28.1%	9.4%	18.8%	.125	0.76	.184	73.3%	53	60	2.46
2024			8.60	3.12	2.76	1.14	22.6%	8.2%	14.4%	.241	1.27	.289	72.1%			4.11
2025	LAA	ST	8.00	4.00	2.00	0.00	22.2%	11.1%	11.1%	.188	1.11	.250	100.0%	0	69	3.29
2025	LAA	MLB	11.53	5.53	2.09	1.89	28.4%	13.6%	14.8%	.225	1.47	.278	80.1%	116	130	5.36
2025			8.49	3.21	2.64	1.18	22.2%	8.4%	13.8%	.242	1.29	.289	72.3%			4.22
2026	LAA	ST	6.97	4.35	1.60	1.74	18.2%	11.4%	6.8%	.211	1.26	.214	71.4%	104	131	6.36
2026	FGDC	PROJ	9.80	4.62	2.12	1.19	24.9%	11.7%	13.2%	.229	1.38	.287	71.1%			4.47
2026	Steamer	PROJ	9.62	4.49	2.14	1.24	24.5%	11.4%	13.1%	.235	1.39	.290	73.2%			4.46
2026	ZiPS	PROJ	9.98	4.75	2.10	1.15	25.3%	12.0%	13.3%	.223	1.36	.283	69.0%			4.48
2026	ZiPS DC	PROJ	9.98	4.75	2.10	1.15	25.3%	12.0%	13.3%	.223	1.36	.283	69.0%			4.48
2026	ATC	PROJ	9.89	4.80	2.06	1.29	25.1%	12.2%	12.9%	.228	1.39	.283	72.2%			4.61
2026	THE BAT	PROJ	10.38	4.64	2.24	1.25	26.4%	11.8%	14.6%	.225	1.37	.286	71.3%			4.39
2026	THE BAT X	PROJ	10.21	4.60	2.22	1.10	26.1%	11.8%	14.3%	.221	1.34	.283	72.3%			4.19
2026	OOPSY	PROJ	10.71	4.73	2.26	1.18	27.1%	12.0%	15.1%	.213	1.34	.273	75.8%			4.20
2026	2 Tms	MLB	12.14	5.17	2.35	0.90	30.9%	13.2%	17.8%	.192	1.28	.273	73.7%	94	93	3.82
2026	LAA	MLB	13.06	5.57	2.34	0.87	33.5%	14.3%	19.2%	.163	1.20	.240	74.6%	89	92	3.78
2026	CHC	MLB	9.50	4.00	2.38	1.00	23.8%	10.0%	13.7%	.268	1.50	.340	71.4%	110	95	3.93
2026			8.50	3.41	2.49	1.16	22.1%	8.9%	13.3%	.241	1.30	.288	72.3%			4.28
2026	FGDC	ROS	10.77	4.90	2.20	0.99	28.1%	12.8%	15.3%	.202	1.28	.268	73.8%			4.04
Total	- - -	MLB	11.59	5.07	2.28	1.19	29.6%	13.0%	16.6%	.198	1.29	.265	76.3%	98	104	4.27

Partial SeasonsPreseason ProjectionsIn-Season ProjectionsMinor LeaguesSpring TrainingMLB Regular Season

Season	Team	Level	Events	EV	maxEV	LA	Barrels	Barrel%	HardHit	HardHit%	ERA	xERA
2024	BOS	AAA	61	84.4	107.4	16.7	4	6.6%	18	29.5%	5.47	4.45
2024	LAA	AAA	19	89.8	105.6	18.6	0	0.0%	8	42.1%	2.35	3.17
2024	LAA	MLB	38	87.0	109.8	17.3	0	0.0%	10	26.3%	2.12	1.66
2025	LAA	MLB	145	88.3	114.9	15.2	15	10.3%	54	37.2%	4.74	4.34
2026	LAA	ST	30	90.2	110.1	17.3	0	0.0%	13	43.3%	5.23
2026	2 Tms	MLB	161	88.9	108.2	13.3	9	5.6%	57	35.4%	3.88	3.09
2026	LAA	MLB	109	88.9	108.2	16.6	6	5.5%	38	34.9%	3.66	2.96
2026	CHC	MLB	52	88.9	107.0	6.4	3	5.8%	19	36.5%	4.50	3.49
Total	- - -	MLB	344	88.4	114.9	14.5	24	7.0%	121	35.2%	4.01	3.37

Season	Team	Level	Events	EV	maxEV	LA	Barrels	Barrel%	HardHit	HardHit%	ERA	xERA
2024	BOS	AAA	61	84.4	107.4	16.7	4	6.6%	18	29.5%	5.47	4.45
2024	LAA	AAA	19	89.8	105.6	18.6	0	0.0%	8	42.1%	2.35	3.17
2024	LAA	MLB	38	87.0	109.8	17.3	0	0.0%	10	26.3%	2.12	1.66
2025	LAA	MLB	145	88.3	114.9	15.2	15	10.3%	54	37.2%	4.74	4.34
2026	LAA	ST	30	90.2	110.1	17.3	0	0.0%	13	43.3%	5.23
2026	2 Tms	MLB	161	88.9	108.2	13.3	9	5.6%	57	35.4%	3.88	3.09
2026	LAA	MLB	109	88.9	108.2	16.6	6	5.5%	38	34.9%	3.66	2.96
2026	CHC	MLB	52	88.9	107.0	6.4	3	5.8%	19	36.5%	4.50	3.49
Total	- - -	MLB	344	88.4	114.9	14.5	24	7.0%	121	35.2%	4.01	3.37

Ryan Zeferjahn

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BAL	CHW	ATH
BOS	CLE	HOU
NYY	DET	LAA
TBR	KCR	SEA
TOR	MIN	TEX

ATL	CHC	ARI
MIA	CIN	COL
NYM	MIL	LAD
PHI	PIT	SDP
WSN	STL	SFG