Mason Thompson

#71 - Relief Pitcher

Washington Nationals

Bats / Throws	Right / Right
Date of Birth	2/20/1998 (26)
Height, Weight	6'6", 241 lb
Hometown	Round Rock, TX

2023 Season Stats

MLB Rank MLB Average

	Sv	IP	ERA	WHIP	K%	BB%
	1	54.0	5.50	1.56	18.3%	9.2%

	109^th 3 Sv	124^th 44 IP	292^nd 4.16 ERA	294^th 1.32 WHIP	290^th 23.7% K%	158^th 9.5% BB%

	FB MPH	SwStr%	CSW%	Str-ICR	MTK%	PLV	PLA
	94.6	9.5%	27.4%	-	11.3%	4.77	4.59

	131^st 94.4 FB MPH	291^st 12.6% SwStr%	261^st 29.3% CSW%	- Str-ICR	316^th - MTK%	295^th 4.97 PLV	273^rd - PLA

Articles

12/16/2023Identifying Relievers Who Could StartMichael Barker

9/14/2023Fantasy Baseball Relief Pitcher Rankings - 9/14/23 Depth ChartWynn McDonald

9/13/2023Fantasy Baseball Relief Pitcher Rankings - 9/13/23 Depth ChartJosh Mockensturm

9/12/2023Fantasy Baseball Relief Pitcher Rankings - 9/12/23 Depth ChartBenjamin Haller

9/11/2023Fantasy Baseball Relief Pitcher Rankings - 9/11/23 Depth ChartEric Dadmun

See More Articles

Stats Glossary

Overview

Hide 2023 MLB Percentile | Hide 2023 MLB Average

Year	Team	G	GS	IP	W-L	Sv	Hld	ERA	WHIP	xERA	FIP	xFIP	PLA	K%	BB%	H/9	HR/9	BABIP	HR/FB%	LOB%	ICR	GB%	SwStr%	CSW%	IPR	PLV
2021	WSH/SD	31	0	24.2	1-3	0	7	4.01	1.91	5.36	5.40	4.93	4.82	19.0%	12.4%	11.7	1.46	.368	19.0%	77.8%	35.4%	53.7%	9.2%	25.5%	0.29	4.74
2022	WSH	24	0	24.2	1-1	1	0	2.92	1.14	3.31	4.19	4.61	3.57	15.0%	8.0%	6.9	0.73	.233	9.1%	80.2%	27.6%	55.3%	12.0%	26.1%	0.39	4.86
2023	WSH	51	0	54.0	4-4	1	10	5.50	1.56	4.14	4.03	4.64	4.59	18.3%	9.2%	10.3	0.67	.352	8.7%	64.3%	34.1%	51.2%	9.5%	27.4%	0.40	4.77
RP MLB Percentile		60	0	62	69-15	47	68	15	13	44	48	33	20	16	53	11	74	9	75	16	71	75	14	23	-	11
RP MLB AVG		40	0	44.0	3-2	3	7	4.16	1.32	4.24	4.16	4.17	4.02	23.7%	9.5%	8.2	1.08	.293	13.0%	72.3%	36.7%	45.6%	12.6%	29.3%	0.53	4.97
Career		106	0	103.1	6-8	2	17	4.53	1.54	-	-	-	4.40	17.8%	9.8%	9.8	0.87	.328	11.2%	70.9%	32.9%	52.7%	10.0%	26.6%	0.37	4.78

Repertoire

Sinker | 57%
Slider | 28%
Curveball | 8%
Four-Seamer | 6%
Changeup | 0%
All

2021 2022 2023 All

Hide 2023 MLB Percentile | Hide 2023 MLB Average

Year	Usage%	MPH	Zone%	O-Sw%	Str%	SwStr%	CS%	CSW%	Str-ICR	GB%	FB%	ICR	HR/FB%	AVG	BABIP	HL	HP	MTK%	PLV
2021	78.1%	96.2	46.5%	23.7%	60.1%	6.0%	17.8%	23.9%	46.2%	55.9%	23.5%	33.8%	18.8%	.309	.344	+6	5.3	6.3%	4.74
2022	73.1%	95.8	48.0%	32.1%	65.8%	8.9%	12.3%	21.2%	50.9%	54.4%	29.4%	29.4%	5.0%	.243	.258	+5	0.6	7.1%	4.82
2023	56.8%	94.6	53.3%	21.5%	64.0%	5.1%	21.9%	27.0%	47.0%	47.7%	28.4%	39.4%	12.9%	.369	.394	+7	8.2	9.1%	4.77
RP MLB Percentile	91	61	60	28	34	32	55	43	75	20	72	46	51	25	25	2	3	56	53
RP MLB AVG	30.0%	93.5	50.7%	27.7%	66.3%	6.8%	21.0%	27.9%	50.9%	57.7%	21.6%	38.7%	16.7%	.304	.324	-1	-0.1	10.7%	4.71

Year	xAVG	xwOBA	xBABIP	xwoBACON	HH%	Brl%	ICR	EV	FB EV	LA	xMov	yMov	xRP	yRP	Ext	Spin
2021	.281	.363	.314	.369	-	5.9%	33.8%	84.3	80.2	5.7	9.0	6.1	-1.3	5.7	6.7	2,219
2022	.241	.292	.255	.271	-	2.9%	29.4%	85.9	86.9	10.6	10.0	6.6	-1.8	5.8	6.7	2,247
2023	.302	.376	.317	.366	-	6.4%	39.4%	87.4	82.8	7.7	10.2	4.8	-1.5	5.6	6.8	2,195
RP MLB Percentile	34	34	37	37	-	34	46	62	79	30	75	50	45	55	82	63
RP MLB AVG	.279	.349	.296	.342	-	5.8%	38.7%	88.4	86.4	3.6	9.2	4.7	-0.8	5.5	6.4	2,146

Year	P	TBF	Strikes	Balls	1B	2B	3B	HR	H	TB	TIC	K	BB	HBP
2021	331	95	199	132	18	4	0	3	25	31	23	14	12	1
2022	269	83	177	92	14	2	1	1	18	21	20	7	7	1
2023	508	146	325	183	32	9	0	4	45	53	43	16	20	1
RP MLB Percentile	95	96	95	3	1	1	15	2	1	-	-	89	2	19
RP MLB AVG	150	40	101	50	7	2	0	1	10	12	10	6	4	1

Year	GB%	LD%	FB%	PU%	Pull%	Cent%	Oppo%	Fl&B%	Solid%	Brl%	SS%	HH%	PC%	ICR
2021	55.9%	20.6%	23.5%	8.8%	44.1%	32.4%	23.5%	20.6%	7.4%	5.9%	26.5%	-	66.1%	33.8%
2022	54.4%	16.2%	29.4%	8.8%	36.8%	32.4%	30.9%	25.0%	1.5%	2.9%	29.4%	-	70.6%	29.4%
2023	47.7%	23.9%	28.4%	6.4%	31.2%	38.5%	30.3%	25.7%	7.3%	6.4%	32.1%	-	60.5%	39.4%
RP MLB Percentile	20	38	72	73	33	64	59	42	22	34	44	-	-	46
RP MLB AVG	57.7%	20.7%	21.6%	5.8%	37.6%	34.2%	28.2%	24.7%	4.7%	5.8%	31.2%	-	64.8%	38.7%

Year	AVG	wOBA	BABIP	BACON	HL	xAVG	xwOBA	xBABIP	xwoBACON	EV	FB EV	LA	HR/FB%
2021	.309	.381	.344	.373	+6	.281	.363	.314	.369	84.3	80.2	5.7	18.8
2022	.243	.294	.258	.269	+5	.241	.292	.255	.271	85.9	86.9	10.6	5.0
2023	.369	.428	.394	.417	+7	.302	.376	.317	.366	87.4	82.8	7.7	12.9
RP MLB Percentile	25	28	25	24	2	34	34	37	37	62	79	30	51
RP MLB AVG	.304	.369	.324	.347	-1	.279	.349	.296	.342	88.4	86.4	3.6	16.7

Year	Zone%	Str%	Swing%	O-Sw%	Whiff%	Foul Str%	Con%	Z-Con%	O-Con%	CS%	SwStr%	CSW%	SIP%	BIP%	PLUS%	IPR	Str-ICR
2021	46.5%	60.1%	42.3%	23.7%	14.3%	15.7%	85.7%	89.8%	76.2%	17.8%	6.0%	23.9%	34.2%	20.5%	52.6%	0.27	46.2%
2022	48.0%	65.8%	53.5%	32.1%	16.7%	19.3%	83.3%	86.9%	75.6%	12.3%	8.9%	21.2%	38.4%	25.3%	59.1%	0.23	50.9%
2023	53.3%	64.0%	42.1%	21.5%	12.1%	15.6%	87.9%	89.0%	84.3%	21.9%	5.1%	27.0%	33.5%	21.5%	55.1%	0.39	47.0%
RP MLB Percentile	60	34	33	28	35	29	35	51	33	55	32	43	28	34	23	67	75
RP MLB AVG	50.7%	66.3%	45.3%	27.7%	14.9%	18.4%	85.1%	88.9%	75.6%	21.0%	6.8%	27.9%	-	-	59.5%	0.48	-

Year	Zone%	aLoc%	x-mLoc%	gLoc%	hiLoc%	y-mLoc%	loLoc%	iLoc%	oLoc%	mmLoc%
2021	46.5%	49.2%	23.0%	27.8%	31.7%	29.0%	39.3%	47.1%	29.9%	10.3%
2022	48.0%	49.4%	29.4%	21.2%	33.8%	30.1%	36.1%	34.6%	36.1%	8.2%
2023	53.3%	44.9%	29.5%	25.6%	33.7%	28.9%	37.4%	33.9%	36.6%	8.3%
RP MLB Percentile	60	38	77	54	72	43	36	31	59	57
RP MLB AVG	50.7%	49.7%	25.2%	25.1%	27.8%	29.7%	42.5%	42.0%	32.8%	7.4%

Year	Early%	Behind%	2-Str%	Early BIP%	F-Str%	TF-Str%	ECS%	2-Str O Sw%	PAR%
2021	63.4%	21.1%	15.4%	19.0%	58.5%	44.7%	19.0%	23.5%	27.5%
2022	61.0%	14.5%	24.5%	23.8%	56.8%	40.5%	16.5%	22.7%	10.6%
2023	61.2%	20.9%	17.9%	17.4%	67.8%	50.0%	24.4%	12.1%	17.6%
RP MLB Percentile	34	19	43	51	64	43	49	11	56
RP MLB AVG	64.4%	16.0%	19.6%	17.8%	63.4%	49.9%	25.1%	24.9%	16.2%

Year	MPH	Ext	iHB	iVB	Total Break	VAA	Height Adj. VAA	Spin	PLV
2021	96.2	6.7	15.6	8.9	18.1	-5.6	0.7	2,219	4.74
2022	95.8	6.7	17.0	9.9	19.8	-5.7	0.6	2,247	4.82
2023	94.6	6.8	17.4	6.8	18.9	-5.8	0.5	2,195	4.77
RP MLB Percentile	61	82	72	49	63	51	37	63	53
RP MLB AVG	93.5	6.4	-	-	-	-	-	2,146	4.71

Year	P	PLV	PLA	QP%	AP%	BP%	Q-BP%	HP	HL
2021	331	4.74	4.82	43.8%	17.2%	39.0%	4.8%	5.3	+6
2022	269	4.82	3.66	45.7%	17.5%	36.8%	8.9%	0.6	+5
2023	508	4.77	4.60	43.1%	16.5%	40.4%	2.8%	8.2	+7
RP MLB Percentile	95	53	-	66	27	45	45	3	2
RP MLB AVG	150	4.71	0.92	39.7%	19.6%	40.7%	-1.0%	-0.1	-1

Year	Usage%	MPH	Zone%	O-Sw%	Str%	SwStr%	CS%	CSW%	Str-ICR	GB%	FB%	ICR	HR/FB%	AVG	BABIP	HL	HP	MTK%	PLV
2021	13.7%	83.8	24.1%	40.9%	56.9%	29.3%	13.8%	43.1%	43.1%	16.7%	50.0%	66.7%	33.3%	.333	.800	+3	1.8	8.6%	5.04
2022	23.6%	84.4	43.7%	32.7%	62.1%	21.8%	20.7%	42.5%	59.8%	71.4%	14.3%	14.3%	100.0%	.067	.000	-4	-2.0	9.2%	4.98
2023	28.5%	84.7	40.8%	35.1%	61.2%	16.1%	12.9%	29.0%	56.5%	70.7%	17.1%	14.6%	0.0%	.140	.195	-9	-7.7	14.5%	4.93
RP MLB Percentile	42	41	46	66	44	57	33	42	21	99	10	98	66	83	81	99	98	7	28
RP MLB AVG	31.5%	84.9	41.2%	31.4%	61.6%	15.4%	15.0%	30.4%	49.8%	42.0%	36.6%	37.4%	14.7%	.226	.283	0	-	8.3%	5.09

Year	xAVG	xwOBA	xBABIP	xwoBACON	HH%	Brl%	ICR	EV	FB EV	LA	xMov	yMov	xRP	yRP	Ext	Spin
2021	.219	.273	.459	.682	-	16.7%	66.7%	99.6	96.6	21.8	-2.0	-1.1	-1.7	5.6	6.7	2,244
2022	.144	.237	.195	.442	-	14.3%	14.3%	83.4	72.1	11.0	-1.6	-0.7	-2.2	5.7	6.5	2,199
2023	.154	.160	.211	.195	-	0.0%	14.6%	83.0	80.1	1.1	-1.8	-0.2	-1.9	5.6	6.7	2,225
RP MLB Percentile	80	91	78	93	-	72	98	83	91	96	37	23	33	38	76	23
RP MLB AVG	.221	.292	.274	.369	-	6.9%	37.4%	86.9	87.0	14.7	-2.9	1.1	-1.0	5.6	6.4	2,401

Year	P	TBF	Strikes	Balls	1B	2B	3B	HR	H	TB	TIC	K	BB	HBP
2021	58	15	33	25	4	0	0	1	5	7	4	9	0	0
2022	87	16	54	33	0	0	0	1	1	3	1	8	1	0
2023	255	59	156	99	8	0	0	0	8	8	6	16	1	1
RP MLB Percentile	77	76	77	22	20	73	13	64	37	-	-	72	55	11
RP MLB AVG	175	44	110	65	5	2	0	1	8	10	10	13	3	1

Year	GB%	LD%	FB%	PU%	Pull%	Cent%	Oppo%	Fl&B%	Solid%	Brl%	SS%	HH%	PC%	ICR
2021	16.7%	33.3%	50.0%	16.7%	66.7%	33.3%	0.0%	50.0%	0.0%	16.7%	66.7%	-	33.3%	66.7%
2022	71.4%	14.3%	14.3%	14.3%	71.4%	14.3%	14.3%	0.0%	0.0%	14.3%	14.3%	-	85.7%	14.3%
2023	70.7%	12.2%	17.1%	7.3%	51.2%	24.4%	24.4%	12.2%	2.4%	0.0%	17.1%	-	85.4%	14.6%
RP MLB Percentile	99	83	10	39	66	20	69	88	68	72	93	-	-	98
RP MLB AVG	42.0%	21.5%	36.6%	10.5%	46.6%	33.3%	20.1%	23.8%	5.9%	6.9%	35.2%	-	63.4%	37.4%

Year	AVG	wOBA	BABIP	BACON	HL	xAVG	xwOBA	xBABIP	xwoBACON	EV	FB EV	LA	HR/FB%
2021	.333	.368	.800	.833	+3	.219	.273	.459	.682	99.6	96.6	21.8	33.3
2022	.067	.173	.000	.143	-4	.144	.237	.195	.442	83.4	72.1	11.0	100.0
2023	.140	.144	.195	.195	-9	.154	.160	.211	.195	83.0	80.1	1.1	0.0
RP MLB Percentile	83	92	81	89	99	80	91	78	93	83	91	96	66
RP MLB AVG	.226	.292	.283	.319	0	.221	.292	.274	.369	86.9	87.0	14.7	14.7

Year	Zone%	Str%	Swing%	O-Sw%	Whiff%	Foul Str%	Con%	Z-Con%	O-Con%	CS%	SwStr%	CSW%	SIP%	BIP%	PLUS%	IPR	Str-ICR
2021	24.1%	56.9%	43.1%	40.9%	68.0%	3.4%	32.0%	57.1%	22.2%	13.8%	29.3%	43.1%	18.2%	10.3%	48.3%	0.79	43.1%
2022	43.7%	62.1%	41.4%	32.7%	52.8%	11.5%	47.2%	65.0%	25.0%	20.7%	21.8%	42.5%	13.0%	8.0%	60.9%	0.93	59.8%
2023	40.8%	61.2%	48.2%	35.1%	33.3%	16.1%	66.7%	88.6%	37.7%	12.9%	16.1%	29.0%	26.3%	16.1%	58.0%	0.48	56.5%
RP MLB Percentile	46	44	58	66	52	60	52	20	67	33	57	42	49	49	56	59	21
RP MLB AVG	41.2%	61.6%	46.6%	31.4%	33.1%	15.2%	66.9%	81.5%	45.5%	15.0%	15.4%	30.4%	-	-	56.5%	0.52	-

Year	Zone%	aLoc%	x-mLoc%	gLoc%	hiLoc%	y-mLoc%	loLoc%	iLoc%	oLoc%	mmLoc%
2021	24.1%	5.2%	22.4%	72.4%	6.9%	12.1%	81.0%	17.2%	60.3%	5.2%
2022	43.7%	21.8%	23.0%	55.2%	17.2%	23.0%	59.8%	24.1%	52.9%	8.0%
2023	40.8%	19.6%	18.4%	62.0%	11.0%	18.0%	71.0%	24.7%	56.9%	3.9%
RP MLB Percentile	46	50	21	70	27	30	77	47	72	18
RP MLB AVG	41.2%	20.4%	23.0%	56.5%	17.0%	21.5%	61.5%	25.6%	51.4%	6.1%

Year	Early%	Behind%	2-Str%	Early BIP%	F-Str%	TF-Str%	ECS%	2-Str O Sw%	PAR%
2021	58.6%	0.0%	41.4%	2.9%	23.5%	23.5%	23.5%	45.8%	37.5%
2022	59.8%	3.4%	36.8%	3.8%	60.9%	52.2%	28.8%	21.9%	25.0%
2023	62.7%	5.1%	32.2%	12.5%	52.2%	47.8%	18.8%	29.3%	19.5%
RP MLB Percentile	73	74	41	50	25	38	39	65	49
RP MLB AVG	58.5%	8.1%	33.5%	12.9%	59.5%	50.8%	20.8%	26.4%	20.0%

Year	MPH	Ext	iHB	iVB	Total Break	VAA	Height Adj. VAA	Spin	PLV
2021	83.8	6.7	-4.5	-3.6	6.0	-8.6	-0.8	2,244	5.04
2022	84.4	6.5	-4.7	-2.6