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Greg Weissert

Boston Red Sox · RP Throws: R Bats: R Height: 6'2 Weight: 235 Born: )

Percentile Ranks
vs LHH
vs RHH K%
32.3
57.9 xWOBA
0.295 · 88%
0.295 · 80%
xSLG
93.9
71.7

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		72	0	6-6	67.0	2.82	1.16	20.5%	0.0%	7.6%	.227	.380	.295	.153	7.6%	35.5%	39%	42%	23%	28%	51%	18%	49%	35%	3.2	3.0	1.9	1.1	3.0	3.1
2024		62	0	4-2	63.1	3.13	1.35	22.1%	0.0%	7.6%	.248	.367	.291	.119	5.9%	33.5%	41%	41%	25%	28%	53%	15%	47%	32%	0.0	0.0	0.0	0.0	0.0	0.0
2023		17	0	0-0	20.0	4.05	1.45	25.3%	0.0%	9.2%	.251	.406	.323	.155	7.1%	28.6%	39%	50%	21%	25%	50%	24%	50%	42%	0.0	0.0	0.0	0.0	0.0	0.0
2022		12	0	3-0	11.1	5.56	0.99	22.9%	0.0%	10.4%	.163	.278	.265	.115	3.3%	30.0%	27%	40%	23%	30%	45%	10%	55%	40%	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%	ST		CH		FF		SL		FC		CU		SI		Rating	DK $	DK	FD $	FD
1	2025	Oct, 02	202	1.0	3	11	0	0	0	0	0	1	27.3																n/a	2.25	n/a	3
2	2025	Sep, 28	DET	1.0	5	21	1	0	0	1	2	2	38.1																n/a	5.05	n/a	9
3	2025	Sep, 26	DET	1.1	4	22	0	0	0	0	0	1	13.6																n/a	3.00	n/a	4
4	2025	Sep, 18	ATH	2.0	6	21	0	0	0	0	3	5	47.6																n/a	10.50	n/a	15
5	2025	Sep, 16	ATH	0.1	4	22	2	0	1	1	1	2	31.8																n/a	-1.05	n/a	1
6	2025	Sep, 10	@ATH	1.0	5	16	0	0	0	1	2	1	31.3																n/a	5.65	n/a	9
7	2025	Sep, 09	@ATH	1.0	3	6	1	0	0	0	0	1	50.0																n/a	1.65	n/a	3
8	2025	Sep, 06	@ARI	0.2	4	15	1	0	1	1	0	0	20.0																n/a	-1.70	n/a	-1
9	2025	Sep, 05	@ARI	1.0	4	22	1	0	0	0	1	2	22.7																n/a	3.65	n/a	6
10	2025	Sep, 01	CLE	0.1	1	2	0	0	0	0	0	0	50.0																n/a	0.75	n/a	1
11	2025	Aug, 30	PIT	1.0	3	13	0	0	0	0	3	2	61.5																n/a	8.25	n/a	12
12	2025	Aug, 29	PIT	0.2	4	11	2	0	1	0	1	3	27.3																n/a	0.30	n/a	2
13	2025	Aug, 27	@BAL	1.0	3	8	0	0	0	0	1	1	25.0																n/a	8.25	n/a	12
14	2025	Aug, 23	@NYY	0.2	4	13	2	0	0	0	1	2	23.1																n/a	2.30	n/a	5
15	2025	Aug, 17	MIA	0.1	3	8	2	1	2	0	0	0	50.0																n/a	-4.45	n/a	-5
16	2025	Aug, 13	@HOU	1.0	3	14	0	0	0	0	0	1	28.6	14.3%	80.8	14.3%	85.2	28.6%	93.1	21.4%	84.4	21.4%	91.9						n/a	2.25	n/a	3
17	2025	Aug, 10	@SD	1.0	5	28	2	0	1	0	1	1	25.0	7.1%	80.7	3.6%	85.4	25.0%	92.2	21.4%	84.7			10.7%	78.0	32.1%	92.1		n/a	1.05	n/a	3
18	2025	Aug, 08	@SD	1.0	5	22	1	0	0	1	1	2	31.8	4.5%	81.3	4.5%	85.2	40.9%	93.1	9.1%	83.7	27.3%	92.0			13.6%	80.5		n/a	3.05	n/a	6
19	2025	Aug, 05	KC	1.0	4	17	0	0	0	0	0	1	17.6	5.9%	80.7			35.3%	93.1	23.5%	82.9	29.4%	92.6			5.9%	79.8		n/a	2.25	n/a	3
20	2025	Aug, 01	HOU	1.0	3	12	0	0	0	0	0	0	8.3	8.3%	81.9			50.0%	92.9	25.0%	84.3	8.3%	93.4			8.3%	80.3		n/a	6.25	n/a	9

2024

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

2023

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

2022

Box Score														Pitch Usage/Velo														DFS
#	Date		Opp	IP	BF	PC	H	HR	ER	BB	SO	SwStr	CSW%	ST		FF		SL		CH		SI		FC		CU		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%	47%	.196	.300	20.0	13.3	.371	.103	1	50%	.140	.209	25.9	1.9	.318	.173	2
Slider	Breaking	85.6 MPH	2577	28%	20%	.189	.269	7.7	0.0	.512	.083	0	27%	.425	.475	9.1	9.1	.593	.278	1
Sweeper	Breaking	MPH		22%	8%	.523	.575	0.0	0.0	.823	.500	0	19%	.270	.343	35.7	0.0	.542	.429	2
Changeup	Offspeed	86.0 MPH	1582	32%	24%	.138	.155	25.0	5.0	.158	.000	0	3%	.173	.167	60.0	0.0	.203	.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%	30%	.240	.293	27.0	5.4	.388	.206	2	34%	.134	.138	50.0	0.0	.189	.030	0
Cutter	Fastball	MPH		0%	4%	.050	.047	20.0	0.0	.063	.000	0	1%	.000	.000	100.0	0.0	.000	.000	0
Slider	Breaking	85.5 MPH	2477	11%	14%	.147	.207	20.0	0.0	.345	.400	1	3%	.000	.000	0.0	0.0	.000	.000	0
Sweeper	Breaking	MPH		28%	29%	.248	.371	21.1	21.1	.453	.538	2	62%	.246	.275	17.1	4.9	.339	.081	0
Changeup	Offspeed	84.6 MPH	1852	36%	24%	.287	.323	20.0	8.0	.382	.043	0	0%	.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	93.9 MPH	2167	41%	30%	.273	.343	54.5	0.0	.545	.500	1	23%	.143	.206	64.3	0.0	.357	.250	1
Cutter	Fastball	91.3 MPH	2382	43%	12%	.000	.348	0.0	1.0	.000	.000	0	4%	.000	.348	50.0	50.0	.000	.000	0
Sinker	Fastball	94.1 MPH	2063	11%	20%	.000	.469	0.0	0.0	.306	.331	0	42%	.353	.402	4.3	13.0	.418	.000	0
Sweeper	Breaking	MPH		21%	22%	.600	.530	40.0	0.0	.600	1.000	0	31%	.362	.495	6.7	13.3	.758	.308	1
Changeup	Offspeed	84.5 MPH	1744	83%	17%	.136	.266	50.0	25.0	.161	.000	0	0%	.000	.000	0.0	0.0	.000	.000	0

Splits	vs LHB								vs RHB
Year	PA	xBAVG	xWOBA	xSLG	ISO	K%	BB%	HR	PA	xBAVG	xWOBA	xSLG	ISO	K%	BB%	HR
2025	112	.216	.295	.362	.082	18.8%	11.6%	1	165	.234	.295	.392	.157	21.8%	4.2%	5
2024	109	.265	.327	.423	.227	21.1%	8.3%	6	150	.235	.264	.327	.057	23.3%	4.7%	1
2023	33	.246	.308	.423	.129	30.3%	6.1%	1	54	.255	.331	.394	.152	22.2%	11.1%	2
2022	17	.081	.191	.107	.000	41.2%	11.8%	0	31	.208	.307	.370	.148	12.9%	9.7%	1

	Home								Road
Season	PA	xAVG	xWOBA	K%	BB%	xSLG	ISO	HR	PA	xAVG	xWOBA	K%	BB%	xSLG	ISO	HR
2025	51	.246	.306	28.0%	8.0%	.410	.284	0	49	.205	.261	29.0%	12.0%	.291	.250	0
2024	132	.230	.285	22.7%	8.3%	.348	.160	5	127	.266	.296	22.0%	3.9%	.386	.093	2
2023	52	.228	.303	23.1%	9.6%	.363	.109	1	35	.285	.353	28.6%	8.6%	.469	.194	2
2022	18	.160	.287	11.1%	16.7%	.314	.200	1	30	.165	.252	30.0%	6.7%	.259	.038	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	2.50	2.59	3.12	2.25	2.41	1.92	4.73	0.00	3.90	2.91	1.98
Home	2.66	3.48	2.12	0.00	4.89	2.71	1.62	0.00	3.09	2.91	3.51