Isaac Mattson

Bats R Throws R6'2" 205 lbBorn 1995 Erie, USADebut 2021Team PITDraft 2017 R19 #565 Los Angeles Angels, PittsburghContract 1 y/$794,200 (26) 2026: $565,304

Projections

Season	BF	K%	BB%	HR%	1B%	XBH%	PITCH+
2026	201	23.0	9.6	2.69	20.1	6.13	108.5
2027							107.5
2028							105.6

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 29

His ten closest age-29 comparables averaged 98 PITCH+ the next season; 9 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	Greg Infante	2017	113.4	65.8	42
2	Domingo Tapia	2021	114.8	63.1	90
3	George Sherrill	2006	115.8	125.8	182
4	Tyler Rogers	2020	116.0	114.9	326
5	Sam Selman	2020	111.7	102.2	110
6	Pedro Feliciano	2006	113.6	115.0	275
7	Grant Dayton	2017	116.3	did not play
8	Tommy Layne	2014	113.2	102.9	207
9	Jim Henderson	2012	114.9	112.1	247
10	Dany Jimenez	2023	117.3	82.0	117

Pitching

Year	Team	W	L	ERA	G	GS	SV	IP	BF	HR	BB	SO	PITCH+
2027 proj									201				107.5
2026*									166				91.7	99.3	91.0
2025	PIT	3	3	2.45	44	0	0	47.7	198	4	19	45	114.7	103.9	118.7
2024	PIT	0	0	5.06	3	0	0	5.3	23	0	5	6	129.1	101.3	130.5
2021	BAL	0	0	6.23	4	0	0	4.3	23	0	5	3	89.4	94.2	83.5
Career		3	3	2.98	51	0	0	57.3	244	4	29	54	113.7		116.5

Fielding

Year	Team	Pos	G	Inn	PO	A	E	Fld%	Runs saved
2025	PIT	P	44	48	2	7	1	0.900	+1.0
2024	PIT	P	3	5	0	1	0	1.000	+0.0
2021	BAL	P	4	4	0	0	0		-0.2

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

Minor leagues

Year	Level	Team	Side	PA / BF	Line	AVG / ERA
2026	AAA	Indianapolis Indians	Pit	63	15.0 IP, 29% K	1.80
2025	AAA	Indianapolis Indians	Pit	84	21.0 IP, 30% K	2.57
2024	AAA	Indianapolis Indians	Pit	255	60.0 IP, 30% K	3.15
2024	AA	Altoona Curve	Pit	44	11.0 IP, 30% K	3.27
2023	AA	Wichita Wind Surge	Pit	139	32.1 IP, 30% K	3.64
2022	AAA	Norfolk Tides	Pit	86	17.2 IP, 16% K	6.80
2021	AAA	Norfolk Tides	Pit	81	17.1 IP, 30% K	6.32
2019	AAA	Salt Lake Bees	Pit	42	9.1 IP, 45% K	3.96
2019	AA	Mobile BayBears	Pit	174	43.2 IP, 35% K	2.71
2019	A+	Inland Empire 66ers	Pit	76	20.1 IP, 39% K	0.90
2018	A+	Inland Empire 66ers	Pit	155	37.1 IP, 25% K	3.64
2018	A	Burlington Bees	Pit	243	57.0 IP, 19% K	3.95
2017	Rk	Orem Owlz	Pit	103	26.2 IP, 39% K	1.37
2017	Rk	nan	Pit	121	31.1 IP, 39% K	1.45

Splits

Year	vs LHP	vs RHP	Home	Away
2026	0.398	0.296	0.339	0.367
2025	0.365	0.191	0.254	0.285
2024	0.070	0.339	0.440	0.054
2021	0.644	0.213	0.468	0.267

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