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Gregory Santos

Seattle Mariners · RP Throws: R Bats: R Height: 6'2 Weight: 190 Born: Aug 28, 1999 (25)

Percentile Ranks
vs LHH
vs RHH K%
nan
nan xWOBA
0.465 · %
0.348 · %
xSLG
nan
nan

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		8	0	1-1	7.0	5.14	2.29	0.0%	0.0%	22.2%	.299	.456	.391	.157	7.1%	21.4%	39%	64%	18%	14%	54%	10%	46%	17%	-0.9	0.0	0.0	0.0	0.0	0.0
2024		8	0	0-1	7.1	4.91	1.13	19.4%	0.0%	3.2%	.237	.316	.270	.079	4.3%	21.7%	35%	57%	22%	13%	51%	15%	49%	33%	0.0	0.0	0.0	1.6	0.0	3.0
2023		60	0	2-2	66.1	3.39	1.30	22.8%	0.0%	5.9%	.245	.314	.276	.070	1.5%	32.8%	35%	52%	30%	16%	52%	18%	49%	54%	3.5	3.5	4.6	3.0	2.3	2.1
2022	Giants	2	0	0-0	3.2	4.91	1.88	11.8%	0.0%	17.6%	.192	.244	.279	.051	0.0%	16.7%	33%	75%	8%	17%	49%	14%	51%	38%	2.5	5.8	0.0	-1.1	0.0	0.0
2021	null	3	0	0-2	2.0	22.50	3.50	23.1%	0.0%	15.4%	.342	.939	.551	.597	37.5%	37.5%	75%	38%	13%	38%	49%	13%	51%	50%	-1.2	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%	SL		SI		FF		CH		Rating	DK $	DK	FD $	FD
1	2025	Apr, 15	@CIN	0.1	5	26	1	0	2	3	0	0	19.2	46.2%	87.3			46.2%	96.6	7.7%	93.3		n/a	-5.65	n/a	-5
2	2025	Apr, 12	TEX	1.0	4	16	2	0	1	0	0	1	31.3	68.8%	87.6	6.3%	97.0	25.0%	96.5				n/a	-0.95	n/a	0
3	2025	Apr, 07	HOU	1.0	7	24	1	0	0	2	0	1	16.7	66.7%	87.7	20.8%	96.8	8.3%	96.1				n/a	0.45	n/a	3
4	2025	Apr, 06	@SF	0.2	4	10	1	0	1	1	0	0	10.0	50.0%	89.9	50.0%	97.9						n/a	-1.70	n/a	-1
5	2025	Apr, 04	@SF	1.0	5	20	1	0	0	1	0	1	10.0	80.0%	89.0	10.0%	99.2	10.0%	97.9				n/a	1.05	n/a	3
6	2025	Apr, 01	DET	1.0	4	13	1	0	0	0	0	1	30.8	46.2%	90.2	53.8%	98.3						n/a	1.65	n/a	3
7	2025	Mar, 30	ATH	1.0	3	10	0	0	0	0	0	1	20.0										n/a	2.25	n/a	3
8	2025	Mar, 28	ATH	1.0	4	12	1	0	0	1	0	1	8.3										n/a	1.05	n/a	3

2024

Box Score														Pitch Usage/Velo								DFS
#	Date		Opp	IP	BF	PC	H	HR	ER	BB	SO	SwStr	CSW%	SL		SI		FF		CH		Rating	DK $	DK	FD $	FD
9	2024	Sep, 29	OAK	1.0	3	9	0	0	0	0	1	3	55.6	55.6%	86.2	22.2%	95.8			22.2%	93.3		n/a	4.25	n/a	6
10	2024	Sep, 27	OAK	1.0	4	16	1	0	0	0	0	0	0.0	43.8%	87.5	50.0%	96.6			6.3%	92.4		n/a	1.65	n/a	3
11	2024	Jul, 31	@BOS	0.2	2	9	0	0	0	0	1	2	44.4										n/a	3.50	n/a	5
12	2024	Jul, 27	@CWS	0.2	5	23	2	0	1	0	1	2	26.1	73.9%	91.2	26.1%	97.4						n/a	0.30	n/a	2
13	2024	Jul, 24	LAA	0.2	4	16	2	0	2	0	1	2	25.0	50.0%	91.2	50.0%	99.6						n/a	-1.70	n/a	-1
14	2024	Jul, 21	HOU	1.1	6	13	2	0	1	0	0	0	23.1	53.8%	92.2	46.2%	100.3						n/a	-0.20	n/a	1
15	2024	Jul, 12	@LAA	1.0	4	13	0	0	0	1	2	2	30.8	61.5%	91.0	38.5%	99.2						n/a	5.65	n/a	9
16	2024	Jul, 09	@SD	1.0	3	13	0	0	0	0	0	0	15.4	53.8%	91.0	46.2%	100.1						n/a	2.25	n/a	3

2023

Box Score														Pitch Usage/Velo								DFS
#	Date		Opp	IP	BF	PC	H	HR	ER	BB	SO	SwStr	CSW%	SL		SI		FF		CH		Rating	DK $	DK	FD $	FD
17	2023	Sep, 16	MIN	1.0	8	30	2	0	3	2	0	0	20.0										n/a	-6.15	n/a	-6
18	2023	Sep, 12	KC	1.1	4	13	0	0	0	0	2	3	61.5										n/a	7.00	n/a	10
19	2023	Sep, 10	@DET	1.0	4	14	0	0	0	0	1	3	42.9										n/a	4.25	n/a	6
20	2023	Sep, 06	@KC	0.2	2	10	0	0	0	0	0	0	20.0										n/a	1.50	n/a	2
21	2023	Sep, 05	@KC	0.2	6	14	2	0	0	1	0	1	21.4										n/a	-0.30	n/a	2
22	2023	Sep, 03	DET	1.0	3	15	0	0	0	0	2	3	33.3										n/a	6.25	n/a	9
23	2023	Aug, 30	@BAL	1.0	4	20	2	0	0	0	1	2	30.0										n/a	3.05	n/a	6
24	2023	Aug, 23	SEA	1.1	10	36	4	0	3	1	2	4	27.8										n/a	-2.00	n/a	1
25	2023	Aug, 20	@COL	1.1	4	16	0	0	0	0	1	1	43.8										n/a	5.00	n/a	7
26	2023	Aug, 16	@CHC	0.0	3	11	2	1	3	1	0	2	18.2										n/a	-7.80	n/a	-9
27	2023	Aug, 15	@CHC	1.2	5	16	0	0	0	0	3	5	62.5										n/a	9.75	n/a	14
28	2023	Aug, 11	MIL	1.0	4	12	1	0	0	0	0	2	33.3										n/a	1.65	n/a	3
29	2023	Aug, 09	NYY	2.0	7	31	0	0	0	1	2	4	35.5										n/a	7.90	n/a	12
30	2023	Aug, 03	@TEX	1.0	6	18	3	0	1	0	1	1	27.8										n/a	0.45	n/a	3
31	2023	Jul, 28	CLE	1.0	5	17	1	0	0	0	2	6	47.1										n/a	5.65	n/a	9
32	2023	Jul, 27	CLE	1.2	7	16	2	0	1	0	1	3	31.3										n/a	2.55	n/a	5
33	2023	Jul, 22	@MIN	0.2	5	18	2	0	0	1	1	2	16.7										n/a	1.70	n/a	5
34	2023	Jul, 20	@NYM	0.2	3	11	1	0	0	0	1	1	18.2										n/a	2.90	n/a	5
35	2023	Jul, 15	@ATL	1.2	6	24	1	0	0	0	2	5	33.3										n/a	7.15	n/a	11
36	2023	Jul, 09	STL	1.0	3	14	1	0	0	0	1	1	28.6										n/a	3.65	n/a	6

2022

Box Score														Pitch Usage/Velo								DFS
#	Date		Opp	IP	BF	PC	H	HR	ER	BB	SO	SwStr	CSW%	SL		SI		FF		CH		Rating	DK $	DK	FD $	FD
37	2022	Jul, 25	@ARI	2.0	12	46	3	0	2	3	1	4	21.7										n/a	-1.10	n/a	3
38	2022	Jul, 25	SF	2.0	12	46	3	0	2	3	1	4	21.7										n/a	-1.10	n/a	3
39	2022	May, 05	@SF	1.2	5	21	0	0	0	0	1	2	28.6										n/a	5.75	n/a	8
40	2022	May, 05	STL	1.2	5	21	0	0	0	0	1	2	28.6										n/a	5.75	n/a	8
41	2022	Apr, 14	@TOR	1.0	6	27	1	0	0	2	1	2	22.2										n/a	2.45	n/a	6

2021

Box Score														Pitch Usage/Velo								DFS
#	Date		Opp	IP	BF	PC	H	HR	ER	BB	SO	SwStr	CSW%	SL		SI		FF		CH		Rating	DK $	DK	FD $	FD
42	2021	Apr, 27	COL	1.0	7	22	3	2	2	1	1	2	22.7										n/a	-2.15	n/a	0
43	2021	Apr, 24	MIA	0.0	3	15	2	1	3	1	0	0	26.7										n/a	-7.80	n/a	-9
44	2021	Apr, 22	@SF	1.0	3	16	0	0	0	0	2	3	37.5										n/a	6.25	n/a	9

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%	20%	.000	1.263	0.0	0.0	.663	.815	0	13%	1.000	.986	0.0	1.0	2.000	1.000	0
Sinker	Fastball	98.0 MPH	2373	10%	22%	.500	.531	0.0	1.0	.500	.500	0	22%	.333	.398	0.0	1.0	.333	.333	0
Slider	Breaking	88.5 MPH	2508	13%	58%	.200	.382	0.0	2.0	.400	.200	0	63%	.214	.225	0.0	1.0	.214	.214	0
Changeup	Offspeed	MPH		0%	2%	.000	.000	0.0	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
Sinker	Fastball	98.3 MPH	2433	17%	30%	.600	.556	0.0	1.0	.600	.600	0	90%	.125	.178	11.1	0.0	.125	.143	0
Slider	Breaking	89.8 MPH	2533	23%	70%	.250	.314	50.0	0.0	.500	.500	0
Changeup	Offspeed	MPH		0%	10%	.000	.000	0.0	0.0	.000	.000	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		8%	0%	.000	.000	0.0	0.0	.000	.000	0	0%	.000	.000	0.0	0.0	.000	.000	0
Sinker	Fastball	98.8 MPH	2385	21%	40%	.261	.287	18.4	6.1	.313	.089	0	50%	.309	.351	11.3	7.5	.414	.153	2
Slider	Breaking	91.4 MPH	2524	38%	58%	.213	.236	33.8	2.6	.275	.000	0	48%	.192	.212	27.8	5.1	.238	.013	0
Changeup	Offspeed	93.2 MPH	2121	25%	1%	.000	.000	0.0	0.0	.000	.000	0	2%	.500	.526	0.0	1.0	.500	.500	0

Splits	vs LHB								vs RHB
Year	PA	xBAVG	xWOBA	xSLG	ISO	K%	BB%	HR	PA	xBAVG	xWOBA	xSLG	ISO	K%	BB%	HR
2025	12	.302	.465	.620	.222	0.0%	25.0%	0	22	.297	.348	.374	.056	0.0%	13.6%	0
2024	14	.271	.321	.415	.154	28.6%	7.1%	0	17	.210	.228	.236	.000	11.8%	0.0%	0
2023	126	.231	.256	.290	.034	27.8%	4.0%	0	162	.256	.291	.334	.081	19.1%	6.8%	2
2022	9	.196	.367	.277	.000	11.1%	33.3%	0	8	.189	.180	.218	.125	12.5%	0.0%	0

	Home								Road
Season	PA	xAVG	xWOBA	K%	BB%	xSLG	ISO	HR	PA	xAVG	xWOBA	K%	BB%	xSLG	ISO	HR
2025	12	.302	.465	0.0%	25.0%	.620	.222	0	13	.254	.452	0.0%	30.8%	.570	.222	0
2024	14	.271	.321	28.6%	7.1%	.415	.154	0	14	.225	.319	28.6%	7.1%	.366	.083	0
2023	150	.231	.259	22.7%	4.7%	.285	.029	0	138	.260	.294	23.2%	6.5%	.347	.094	2
2022	5	.000	.000	20.0%	0.0%	.000	-1.100	0	12	.263	.367	8.3%	25.0%	.330	.111	0

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	2.35	2.10	2.32	0.00	2.82	2.20	5.15	0.00	0.53	2.76	3.28
Home	2.04	1.14	0.45	0.00	1.02	9.00	8.50	0.00	2.43	1.55	0.00