Mason Thompson

Bats R Throws R6'6" 236 lbBorn 1998 Round Rock, USADebut 2021Team WSHDraft 2016 R3 #85 San Diego Padres, Round Rock (TX) HS

Projections

Season	BF	K%	BB%	HR%	1B%	XBH%	PITCH+
2026	129	21.0	10.0	2.60	21.9	6.34	100.8
2027							102.8
2028							102.3

Projected rates are per plate appearance or batter faced; counting stats scale with projected playing time. Statcast measurements inform these projections as inputs and are reported as measurements, not projected.

Most similar through age 27

His ten closest age-27 comparables averaged 88 PITCH+ the next season; 4 of 10 played. Averages cover only the players who got a next season, which is why the played count matters.

#	Player	Through	PITCH+ then	Next season	Next PA / BF
1	Jesse Chavez	2011	89.8	69.5	123
2	Bryan Garcia	2022	89.7	did not play
3	Randy Messenger	2009	91.7	did not play
4	Javy Guerra	2023	86.3	did not play
5	Todd Coffey	2008	91.5	109.5	336
6	Tom Mastny	2008	91.0	did not play
7	Enny Romero	2018	92.0	did not play
8	Reiver Sanmartin	2023	87.7	did not play
9	Gonzalez Germen	2015	90.7	92.9	182
10	Jason Standridge	2006	89.2	78.1	41

Pitching

Year	Team	W	L	ERA	G	GS	SV	IP	BF	HR	BB	SO	PITCH+
2027 proj									129				102.8
2026*									0
2025	WSH	1	1	11.81	14	0	0	10.7	60	1	12	11	58.3	97.4	55.7
2023	WSH	4	4	5.50	51	0	1	54.0	240	4	22	44	92.5	100.3	92.8
2022	WSH	1	1	2.92	24	0	1	24.7	101	2	9	15	110.5	98.5	109.0
2021	WSH	1	3	4.01	31	0	0	24.7	121	4	15	23	80.0	97.0	77.0
Career		7	9	5.21	120	0	2	114.0	522	11	58	93	89.1		88.0

Fielding

Year	Team	Pos	G	Inn	PO	A	E	DP	Fld%	Runs saved
2025	WSH	P	14	11	0	0	0	0		-0.2
2023	WSH	P	51	54	3	9	0	2	1.000	+0.1
2022	WSH	P	24	25	5	1	0	0	1.000	-0.2
2021	WSH	P	31	25	0	1	2	0	0.333	-0.4

Runs saved covers the Statcast era; for catchers it includes framing.

Minor leagues

Year	Level	Team	Side	PA / BF	Line	AVG / ERA
2026	AAA	Round Rock Express	Pit	177	39.2 IP, 23% K	5.74
2025	AAA	Rochester Red Wings	Pit	46	9.2 IP, 22% K	5.87
2025	AA	Harrisburg Senators	Pit	27	5.2 IP, 26% K	10.38
2022	AAA	Rochester Red Wings	Pit	67	15.1 IP, 28% K	3.58
2021	AAA	El Paso Chihuahuas	Pit	110	26.2 IP, 22% K	5.84
2019	A+	Lake Elsinore Storm	Pit	109	22.1 IP, 20% K	7.74
2019	Rk	AZL Padres 2	Pit	20	4.0 IP, 15% K	6.75
2019	Rk	nan	Pit	23	5.0 IP, 13% K	5.40
2018	A	Fort Wayne TinCaps	Pit	425	93.0 IP, 23% K	4.94
2017	A	Fort Wayne TinCaps	Pit	115	27.0 IP, 24% K	4.67
2016	Rk	ACL Padres	Pit	50	12.0 IP, 24% K	2.25

Splits

Year	vs LHP	vs RHP	Home	Away
2025	0.504	0.374	0.402	0.453
2023	0.413	0.317	0.307	0.387
2022	0.310	0.235	0.368	0.179
2021	0.391	0.406	0.380	0.418

wOBA by split, from pitch level data, 2015 on. For pitchers the split is the batter side faced.