Mason Thompson

Position: Relief Pitcher

Bats: Right • Throws: Right

6-6, 241lb (198cm, 109kg)

Born: February 20, 1998 in Round Rock, TX us

Draft: Drafted by the San Diego Padres in the 3rd round of the 2016 MLB June Amateur Draft from Round Rock HS (Round Rock, TX).

High School: Round Rock HS (Round Rock, TX)

Rookie Status: Exceeded rookie limits during 2021 season

2026 Contract Status: 2nd-Year Arb Eligible

Service Time (01/2026): 4.022 • Arb Eligible: 2025 • Free Agent: 2028

National Team: us USA (15U)

Full Name: Mason Lane Thompson

Instagram: @mason_thompson22

View Player Info from the B-R Bullpen

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SUMMARY

Career

WAR

-0.8

ERA

5.21

120

114.0

WHIP

1.640

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Year	Age	AgeDif	Tm	Lg	Lev	Aff	W	L	W-L%	ERA	RA9	G	GS	GF	CG	SHO	SV	IP	H	R	ER	HR	BB	IBB	SO	HBP	BK	WP	BF	WHIP	H9	HR9	BB9	SO9	SO/W
2016	18	-2.9	Padres	ARIZ	Rk	SDP	0	0		2.25	2.25	5	5	0	0	0	0	12.0	8	3	3	0	5	0	12	2	0	2	50	1.083	6.0	0.0	3.8	9.0	2.40
2017	19	-2.9	Fort Wayne	MIDW	A	SDP	2	4	.333	4.67	5.67	7	7	0	0	0	0	27.0	23	17	14	2	12	0	28	1	0	2	115	1.296	7.7	0.7	4.0	9.3	2.33
2018	20	-1.9	Fort Wayne	MIDW	A	SDP	6	8	.429	4.94	5.90	22	20	0	0	0	0	93.0	95	61	51	8	37	0	97	8	1	9	425	1.419	9.2	0.8	3.6	9.4	2.62
2019	21		3 Teams	2 Lgs	A+-Rk	SDP	0	5	.000	7.24	8.23	10	8	0	0	0	0	27.1	28	25	22	4	22	0	25	3	0	2	132	1.829	9.2	1.3	7.2	8.2	1.14
2019	21	-2.2	Lake Elsinore	CALL	A+	SDP	0	5	.000	7.66	8.46	7	6	0	0	0	0	22.1	22	21	19	3	19	0	22	3	0	2	109	1.836	8.9	1.2	7.7	8.9	1.16
2019	21	0.4	Padres 1	ARIZ	Rk	SDP	0	0		0.00	0.00	1	0	0	0	0	0	1.0	0	0	0	0	0	0	0	0	0	0	3	0.000	0.0	0.0	0.0	0.0
2019	21	0.4	Padres 2	ARIZ	Rk	SDP	0	0		6.75	9.00	2	2	0	0	0	0	4.0	6	4	3	1	3	0	3	0	0	0	20	2.250	13.5	2.3	6.8	6.8	1.00

2021	23		2 Teams	NL	Maj	SDP-WSN	1	3	.250	4.01	5.47	31	0	5	0	0	0	24.2	32	15	11	4	15	1	23	1	0	3	121	1.905	11.7	1.5	5.5	8.4	1.53
2021	23	-4.4	El Paso	AAAW	AAA	SDP	3	2	.600	5.74	6.08	23	0	12	0	0	7	26.2	25	18	17	4	8	0	24	0	0	1	110	1.238	8.4	1.4	2.7	8.1	3.00
2021	23	-5.9	SDP	NL	Maj	SDP	0	0		3.00	3.00	4	0	1	0	0	0	3.0	4	1	1	0	1	0	2	0	0	2	13	1.667	12.0	0.0	3.0	6.0	2.00
2021	23	-5.9	WSN	NL	Maj	WSN	1	3	.250	4.15	5.82	27	0	4	0	0	0	21.2	28	14	10	4	14	1	21	1	0	1	108	1.938	11.6	1.7	5.8	8.7	1.50
2022	24		2 Teams	2 Lgs	AAA-Rk	WSN	0	4	.000	3.50	5.50	14	4	4	0	0	0	18.0	17	11	7	0	5	1	26	3	0	2	79	1.222	8.5	0.0	2.5	13.0	5.20
2022	24	-3.0	Rochester	IL	AAA	WSN	0	4	.000	3.52	5.28	11	1	4	0	0	0	15.1	15	9	6	0	5	1	19	1	0	2	67	1.304	8.8	0.0	2.9	11.2	3.80
2022	24	3.0	Nationals	FCL	Rk	WSN	0	0		3.38	6.75	3	3	0	0	0	0	2.2	2	2	1	0	0	0	7	2	0	0	12	0.750	6.8	0.0	0.0	23.6
2022	24	-5.2	WSN	NL	Maj	WSN	1	1	.500	2.92	2.92	24	0	8	0	0	1	24.2	19	8	8	2	9	0	15	1	0	1	101	1.135	6.9	0.7	3.3	5.5	1.67
2023	25	0.6	Harrisburg	EL	AA	WSN	0	0		0.00	0.00	1	0	0	0	0	0	1.0	0	0	0	0	0	0	1	0	0	0	3	0.000	0.0	0.0	0.0	9.0
2023	25	-4.2	WSN	NL	Maj	WSN	4	4	.500	5.50	5.83	51	0	5	0	0	1	54.0	62	35	33	4	22	0	44	4	0	4	240	1.556	10.3	0.7	3.7	7.3	2.00

2025	27		3 Teams	3 Lgs	AAA-AA-Rk	WSN	0	2	.000	6.61	6.61	15	1	0	0	0	0	16.1	20	12	12	1	10	0	19	3	0	0	78	1.837	11.0	0.6	5.5	10.5	1.90
2025	27	-0.3	Rochester	IL	AAA	WSN	0	1	.000	5.59	5.59	10	0	0	0	0	0	9.2	11	6	6	1	6	0	10	1	0	0	46	1.759	10.2	0.9	5.6	9.3	1.67
2025	27	2.3	Harrisburg	EL	AA	WSN	0	1	.000	9.53	9.53	4	1	0	0	0	0	5.2	7	6	6	0	4	0	7	2	0	0	27	1.941	11.1	0.0	6.4	11.1	1.75
2025	27	6.1	Nationals	FCL	Rk	WSN	0	0		0.00	0.00	1	0	0	0	0	0	1.0	2	0	0	0	0	0	2	0	0	0	5	2.000	18.0	0.0	0.0	18.0
2025	27	-2.1	WSN	NL	Maj	WSN	1	1	.500	11.81	13.50	14	0	3	0	0	0	10.2	16	16	14	1	12	2	11	0	0	0	60	2.625	13.5	0.8	10.1	9.3	0.92
2026	28	0.3	Round Rock	PCL	AAA	TEX	3	3	.500	6.30	7.20	29	3	7	0	0	3	30.0	32	24	21	3	15	0	29	3	0	2	139	1.567	9.6	0.9	4.5	8.7	1.93
Year	Age	AgeDif	Tm	Lg	Lev	Aff	W	L	W-L%	ERA	RA9	G	GS	GF	CG	SHO	SV	IP	H	R	ER	HR	BB	IBB	SO	HBP	BK	WP	BF	WHIP	H9	HR9	BB9	SO9	SO/W
Majors (4 seasons)					Majors		7	9	.438	5.21	5.84	120	0	21	0	0	2	114.0	129	74	66	11	58	3	93	6	0	8	522	1.640	10.2	0.9	4.6	7.3	1.60
Minors (9 seasons)					Minors		14	28	.333	5.26	6.12	126	48	23	0	0	10	251.1	248	171	147	22	114	1	261	23	1	20	1131	1.440	8.9	0.8	4.1	9.3	2.29
All Levels (9 Seasons)							21	37	.362	5.25	6.04	246	48	44	0	0	12	365.1	377	245	213	33	172	4	354	29	1	28	1653	1.503	9.3	0.8	4.2	8.7	2.06

AAA (4 seasons)					Minors		6	10	.375	5.51	6.28	73	4	23	0	0	10	81.2	83	57	50	8	34	1	82	5	0	5	362	1.433	9.1	0.9	3.7	9.0	2.41
AA (2 seasons)					Minors		0	1	.000	8.10	8.10	5	1	0	0	0	0	6.2	7	6	6	0	4	0	8	2	0	0	30	1.650	9.5	0.0	5.4	10.8	2.00
A+ (1 season)					Minors		0	5	.000	7.66	8.46	7	6	0	0	0	0	22.1	22	21	19	3	19	0	22	3	0	2	109	1.836	8.9	1.2	7.7	8.9	1.16
A (2 seasons)					Minors		8	12	.400	4.88	5.85	29	27	0	0	0	0	120.0	118	78	65	10	49	0	125	9	1	11	540	1.392	8.9	0.8	3.7	9.4	2.55
Rk (4 seasons)					Minors		0	0		3.05	3.92	12	10	0	0	0	0	20.2	18	9	7	1	8	0	24	4	0	2	90	1.258	7.8	0.4	3.5	10.5	3.00