Pro Baseball Terminal — MLB projections, standings & analytics

Mason Thompson

P · WSH

28 yrs

Pitcher

Description

Position: P
Team: WSH
Type: Pitcher
Bats: Right
Throws: Right
Born: 1998-02-20
Age: 28
Country: USA
Height: 6'6"
Weight: 241 lb
Last active: 2025

Career Résumé

4 seasons

Seasons	4 2021–2025
Games	120
W-L	7-9
ERA	5.21
WHIP	1.64
IP	114
SO	93
SV	2

Pitching

Regular season

Season	Tm	W	L	ERA	WHIP	G	SV	IP	SO	BB	HR	ER	xERA	Brl%
2025	WSH	1	1	11.81	2.63	14	0	10.2	11	12	1	14	5.96	8.1%
2023	WSH	4	4	5.50	1.56	51	1	54.0	44	22	4	33	4.58	5.3%
2022	WSH	1	1	2.92	1.14	24	1	24.2	15	9	2	8	3.64	3.9%
2021	WSH	1	3	4.01	1.91	31	0	24.2	23	15	4	11	4.79	6.1%

Season	Pos	G	Inn	PO	A	E	DP	FLD%	RF/9	OAA
2025	P	14	10.2	0	0	0	0	—	0.00	—
2023	P	51	54.0	3	9	0	2	1.000	2.00	—
2022	P	24	24.2	5	1	0	0	1.000	2.19	—
2021	P	31	24.2	0	1	2	0	.333	0.36	—

Pitching game log

2025 · last 14

Date		Opp	Res	Dec	IP	H	R	ER	HR	BB	SO	Pit
2025-09-19	@	NYM	L	ND	1.0	2	3	3	0	3	2	29
2025-09-16	vs	ATL	L	L	0.1	3	5	4	0	1	1	27
2025-09-14	vs	PIT	W	ND	1.0	0	0	0	0	1	1	17
2025-09-11	@	MIA	L	ND	1.0	1	0	0	0	0	1	16
2025-09-10	@	MIA	L	ND	0.1	1	0	0	0	0	0	7
2025-09-07	@	CHC	W	W	1.0	2	1	1	1	0	1	15
2025-09-03	vs	MIA	W	ND	1.0	1	1	0	0	1	1	23
2025-08-30	vs	TB	L	ND	1.0	0	0	0	0	0	1	15
2025-07-21	vs	CIN	W	ND	0.1	0	1	1	0	2	0	12
2025-07-18	vs	SD	L	ND	0.2	0	0	0	0	1	0	15
2025-07-13	@	MIL	L	ND	1.0	0	0	0	0	1	1	19
2025-07-10	@	STL	L	ND	0.1	4	5	5	0	1	0	17
2025-07-08	@	STL	L	ND	1.0	1	0	0	0	0	1	16
2025-07-06	vs	BOS	L	ND	0.2	1	0	0	0	1	1	11

Pitching Profile2023 · vs 410

K/9

7.320

BB/9

3.734

HR/9

0.783

ERA

5.5011

WHIP

1.569

xERA

4.5831

Brl%A

5.3%84

PlayerMedian (50th)percentile vs league

Career Highs

Stat	Best	Year
Wins	4	2023
SO	44	2023
SV	1	2023
ERA	2.92	2022
WHIP	1.14	2022

Comparable Players

2023 · stat-profile similarity

Mauricio LloveraBOS30y
4.89 ERA · 29 K · 1.46 WHIP
89%
vs
Sam LongATH30y
5.60 ERA · 32 K · 1.56 WHIP
85%
vs
Collin McHughATL39y
4.30 ERA · 47 K · 1.57 WHIP
85%
vs
Grant HartwigNYM28y
4.84 ERA · 30 K · 1.39 WHIP
85%
vs
Tucker DavidsonKC30y
5.96 ERA · 46 K · 1.62 WHIP
84%
vs

Career Arc

ERA by season · taller = better

Year over Year

pitching trajectory

Yr	Tm	W	ERA	WHIP	SO	IP
21	WSH	1	4.01	1.91	23	25
22	WSH	1	2.92▼	1.14▼	15▼	25
23	WSH	4▲	5.50▲	1.56▲	44▲	54▲
25	WSH	1▼	11.81▲	2.63▲	11▼	11▼

Career Milestones

chase to the next mark

Wins7

43 to 50

Strikeouts93

907 to 1,000

Saves2

98 to 100

Season

Pitch Arsenal

2025 · Statcast

Pitch	Use	Velo	Spin
Sinker	40%	95.0	2191
Slider	34%	84.9	2188
4-Seam	18%	94.8	2204
Curve	5%	82.1	2396
Changeup	3%	87.3	1977

Plate Discipline

2025 · induced

21.1%

Chase

lg 28.5%

63.1%

Z-Swing

lg 67%

18.6%

Whiff

lg 24.5%

81.4%

Contact

lg 76%

45.1%

Zone

lg 48.5%

23.6%

CSW

lg 28%

246 pitches · green/red vs league avg

Statcast Trend

xERA by season · taller = better

Barrel% Against by season · taller = better

Per game	0.4
Ceiling (90th)	4.1
Floor (10th)	-6.2
Std dev	4.9
Boom rate	64%
Bust rate	36%
Profile	Volatile