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Jhonathan Diaz

Seattle Mariners · RP Throws: L Bats: L Height: 6'0 Weight: 170 Born: Sep 13, 1996 (28)

Percentile Ranks
vs LHH
vs RHH K%
nan
100.0 xWOBA
0.308 · %
0.234 · 100%
xSLG
nan
100.0

Year	Team	G	GS	W-L	IP	ERA	WHIP	K%	CSW%	BB%	xAVG	xSLG	xwOBA	xISO	BAR%	SS%	HH%	GB%	LD%	FB%	Z%	Z Sw%	OZ%	OZ Sw%	Apr	May	Jun	Jul	Aug	Sep
2025		1	0	0-0	1.1	0.00	0.91	20.0%	0.0%	0.0%	.277	.316	.263	.039	0.0%	25.0%	25%	25%	25%	25%	62%	0%	39%	100%	4.4	0.0	0.0	0.0	0.0	0.0
2024		5	1	0-1	9.2	4.66	1.85	17.0%	0.0%	6.4%	.250	.395	.304	.145	2.8%	30.6%	36%	44%	19%	33%	51%	9%	49%	32%	0.0	0.0	8.0	-0.6	-2.2	6.2
2023		4	1	0-0	7.0	10.29	2.86	9.5%	0.0%	16.7%	.305	.435	.395	.130	3.4%	31.0%	35%	45%	21%	28%	42%	12%	58%	35%	0.0	0.0	0.0	0.0	0.0	-1.1
2022		4	3	1-1	15.1	2.93	1.52	16.7%	0.0%	15.2%	.255	.392	.337	.137	4.4%	37.8%	47%	51%	20%	22%	41%	11%	59%	43%	0.0	17.9	-0.8	0.0	0.0	0.0
2021	Angels	3	2	1-0	13.0	4.15	1.38	15.3%	0.0%	11.9%	.275	.443	.365	.168	9.5%	40.5%	33%	43%	24%	26%	48%	12%	52%	35%	0.0	0.0	0.0	0.0	0.0	0.0

2025

Box Score														Pitch Usage/Velo										DFS
#	Date		Opp	IP	BF	PC	H	HR	ER	BB	SO	SwStr	CSW%	FF		CH		SI		CU		SL		Rating	DK $	DK	FD $	FD
1	2025	Apr, 01	DET	1.1	5	26	1	0	0	0	1	2	19.2	11.5%	89.3	19.2%	82.0	11.5%	87.7	11.5%	71.2	46.2%	78.0		n/a	4.40	n/a	7

2024

Box Score														Pitch Usage/Velo										DFS
#	Date		Opp	IP	BF	PC	H	HR	ER	BB	SO	SwStr	CSW%	FF		CH		SI		CU		SL		Rating	DK $	DK	FD $	FD
2	2024	Sep, 17	NYY	2.1	10	44	1	0	0	1	1	1	20.5	36.4%	89.1	9.1%	80.0	20.5%	87.9	4.5%	71.0	29.5%	78.4		n/a	6.05	n/a	10
3	2024	Sep, 04	@OAK	1.0	3	9	0	0	0	0	2	2	44.4	33.3%	89.0					22.2%	71.6	44.4%	77.4		n/a	6.25	n/a	9
4	2024	Aug, 02	PHI	1.0	7	28	3	0	2	1	1	1	25.0	28.6%	91.1	10.7%	82.5	28.6%	89.5	14.3%	73.8	17.9%	78.4		n/a	-2.15	n/a	0
5	2024	Jul, 31	@BOS	0.0	1	3	1	0	0	0	0	0	0.0												n/a	-0.60	n/a	0
6	2024	Jun, 11	CWS	5.1	26	82	9	2	3	1	4	6	25.6	26.8%	90.6	23.2%	81.0	23.2%	88.1	14.6%	72.6	11.0%	79.2	21.04	4,000	8.00	n/a	19

2023

Box Score														Pitch Usage/Velo										DFS
#	Date		Opp	IP	BF	PC	H	HR	ER	BB	SO	SwStr	CSW%	FF		CH		SI		CU		SL		Rating	DK $	DK	FD $	FD
7	2023	Sep, 22	@MIN	2.0	12	43	2	0	1	3	1	0	11.6												n/a	1.50	n/a	6
8	2023	Sep, 15	DET	0.1	10	42	7	0	7	2	0	2	19.0												n/a	-18.65	n/a	-20
9	2023	Sep, 12	@SEA	3.0	13	45	2	0	0	1	3	5	31.1												n/a	10.95	n/a	18
10	2023	Sep, 07	@LAA	1.2	7	30	2	0	0	1	0	4	33.3												n/a	1.95	n/a	5

2022

Box Score														Pitch Usage/Velo										DFS
#	Date		Opp	IP	BF	PC	H	HR	ER	BB	SO	SwStr	CSW%	FF		CH		SI		CU		SL		Rating	DK $	DK	FD $	FD
11	2022	Jun, 10	@LAA	1.2	11	41	5	0	3	2	1	1	19.5												n/a	-4.45	n/a	-1
12	2022	Jun, 10	NYM	1.2	11	41	5	0	3	2	1	1	19.5												n/a	-4.45	n/a	-1
13	2022	Jun, 02	@NYY	4.0	16	0	4	1	2	0	2	0	2.1												n/a	6.60	n/a	12
14	2022	May, 14	@Oak	4.2	18	75	1	0	0	4	4	7	25.3												n/a	15.50	n/a	26
15	2022	May, 06	@LAA	5.0	21	67	3	0	0	4	4	7	25.4												n/a	19.05	n/a	33
16	2022	May, 06	WSH	5.0	21	67	3	0	0	4	4	7	25.4												n/a	19.05	n/a	33

2021

Box Score														Pitch Usage/Velo										DFS
#	Date		Opp	IP	BF	PC	H	HR	ER	BB	SO	SwStr	CSW%	FF		CH		SI		CU		SL		Rating	DK $	DK	FD $	FD

2025 Splits				vs LHB									vs RHB
Pitch	Type	MPH	SPIN	Whiff%	Usage	xBAVG	xWOBA	K%	BB%	xSLG	ISO	HR	Usage	xBAVG	xWOBA	K%	BB%	xSLG	ISO	HR
4-Seamer	Fastball	MPH		0%	12%	.000	.555	0.0	0.0	.534	.481	0	11%	.000	.000	0.0	0.0	.000	.000	0
Sinker	Fastball	MPH		0%	12%	.000	.000	0.0	0.0	.000	.000	0	11%	.000	.000	0.0	0.0	.000	.000	0
Curveball	Breaking	71.6 MPH	2804	0%	17%	.000	.817	0.0	0.0	.709	.679	0
Slider	Breaking	78.5 MPH	2773	14%	75%	.000	.180	0.0	0.0	.117	.135	0	33%	.000	.028	0.0	0.0	.023	.022	0
Changeup	Offspeed	81.8 MPH	1932	33%	28%	.000	.000	100.0	0.0	.000	.000	0

2024 Splits				vs LHB									vs RHB
Pitch	Type	MPH	SPIN	Whiff%	Usage	xBAVG	xWOBA	K%	BB%	xSLG	ISO	HR	Usage	xBAVG	xWOBA	K%	BB%	xSLG	ISO	HR
4-Seamer	Fastball	MPH		0%	25%	.000	.352	0.0	0.0	.113	.195	0	35%	.114	.240	16.7	16.7	.248	.400	1
Sinker	Fastball	88.5 MPH	2140	5%	28%	.000	.512	0.0	0.0	.401	.397	0	19%	.000	.405	0.0	0.0	.349	.330	0
Curveball	Breaking	73.1 MPH	2771	17%	5%	.000	.000	0.0	0.0	.000	.000	0	18%	.500	.733	25.0	0.0	1.250	.500	1
Slider	Breaking	78.6 MPH	2679	35%	43%	.182	.194	45.5	0.0	.273	.333	0
Changeup	Offspeed	81.1 MPH	1841	9%	28%	.167	.224	0.0	1.0	.167	.167	0

2023 Splits				vs LHB									vs RHB
Pitch	Type	MPH	SPIN	Whiff%	Usage	xBAVG	xWOBA	K%	BB%	xSLG	ISO	HR	Usage	xBAVG	xWOBA	K%	BB%	xSLG	ISO	HR
4-Seamer	Fastball	MPH		11%	12%	.000	.348	0.0	1.0	.000	.000	0	40%	.165	.339	10.0	10.0	.248	.143	0
Sinker	Fastball	88.1 MPH	2219	0%	38%	.500	.492	0.0	1.0	.500	.500	0	3%	.000	.696	0.0	1.0	.000	.000	0
Curveball	Breaking	76.7 MPH	2834	0%	7%	.000	.011	0.0	0.0	.009	.009	0
Slider	Breaking	80.6 MPH	2621	40%	50%	.231	.264	14.3	14.3	.276	.000	0	27%	.332	.380	33.3	16.7	.416	.400	0
Changeup	Offspeed	81.9 MPH	1768	7%	24%	.625	.583	0.0	1.0	.875	.556	0

Splits	vs LHB								vs RHB
Year	PA	xBAVG	xWOBA	xSLG	ISO	K%	BB%	HR	PA	xBAVG	xWOBA	xSLG	ISO	K%	BB%	HR
2025	2	.326	.308	.368	.000	0.0%	0.0%	0	3	.244	.234	.282	.000	33.3%	0.0%	0
2024	19	.215	.235	.327	.211	26.3%	0.0%	0	28	.277	.351	.447	.280	10.7%	10.7%	2
2023	14	.373	.406	.436	.000	7.1%	21.4%	0	28	.273	.389	.434	.238	10.7%	14.3%	0
2022	12	.292	.351	.362	.000	16.7%	16.7%	0	54	.247	.334	.399	.178	16.7%	14.8%	1

	Home								Road
Season	PA	xAVG	xWOBA	K%	BB%	xSLG	ISO	HR	PA	xAVG	xWOBA	K%	BB%	xSLG	ISO	HR
2025	2	.326	.308	0.0%	0.0%	.368	.000	0				%	%			0
2024	43	.267	.319	14.0%	7.0%	.408	.250	2	4	.084	.148	50.0%	0.0%	.269	.250	0
2023	17	.535	.589	0.0%	17.6%	.799	.167	0	25	.160	.262	16.0%	16.0%	.205	.158	0
2022	32	.319	.400	15.6%	18.8%	.462	.154	0	34	.199	.279	17.6%	11.8%	.330	.138	1

Split	Games	Wind 0-9 mph+	Wind 10+ mph	Humid 0-25	Humid 25-50	Humid 50-75	Humid 75-100	Temp 0-40	Temp 40-60	Temp 61-79	Temp 80+
Road	6.80	6.94	6.25	0.00	6.25	6.25	7.17	0.00	0.00	9.45	2.83
Home	5.15	3.42	6.05	0.00	2.93	0.00	6.05	0.00	4.40	7.03	-2.15