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Isaac Mattson
Isaac Mattson
Pittsburgh Pirates • Pitcher
Age 31 • 6' 2" • 214 lb
Bats: R • Throws: R
MLB Debut: 2021-05-07
Born: Erie , PA • USA
Draft: 2017
2026 Stats
W
0
L
0
ERA
5.35
WHIP
1.60
IP
38.2
SO
36
SV
0
HLD
8
G
38
GS
0
Career Stats
W
3
L
3
ERA
3.94
WHIP
1.38
IP
96.0
SO
90
SV
0
HLD
20
G
89
GS
0
Year-by-Year Pitching
Year Team GGSIP WLSVSO ERAWHIPAwards
2021 BAL 4 — 4.1 — — — 3 6.23 2.31
2024 PIT 3 — 5.1 — — — 6 5.06 1.13
2025 PIT 44 — 47.2 3 3 — 45 2.45 1.13
2026 PIT 38 — 38.2 — — — 36 5.35 1.60
Spring Training
Pitching
YearTeamGGSIPWLSVSOERAWHIP
2019 LAA 1—1.0 ———1 0.000.00
2020 BAL 2—1.0 ———1 0.001.00
2021 BAL 5—4.2 —113 5.791.71
2024 PIT 4—3.1 ———4 0.000.60
2025 PIT 3—4.0 1——4 4.501.00
2026 PIT 7—7.1 2——8 0.000.41
Game Logs
Season selector loads one year at a time.
Pitching
Date Opponent IP H R ER BB SO HR
2026-09-05 vs LAA 2.0 4 3 3 0 2 0
2026-08-17 vs DET 2.0 2 1 1 2 1 0
2026-07-28 vs AZ 1.2 3 1 1 1 3 0
2026-07-25 vs CHC 0.1 4 3 3 1 1 0
2026-07-19 @ CLE 1.0 0 0 0 0 1 0
2026-07-18 @ CLE 1.0 1 0 0 0 2 0
2026-07-12 vs MIL 0.2 1 0 0 1 1 0
2026-07-11 vs MIL 1.0 1 0 0 0 0 0
2026-07-08 vs ATL 1.0 2 1 1 0 1 0
2026-07-05 @ WSH 1.0 2 0 0 0 1 0
2026-07-03 @ WSH 1.1 3 4 4 1 1 2
2026-06-30 @ PHI 0.2 1 0 0 0 0 0
2026-06-27 vs CIN 1.0 0 0 0 0 2 0
2026-06-26 vs CIN 1.0 0 0 0 0 1 0
2026-06-23 vs SEA 1.0 0 0 0 0 1 0
2026-06-17 @ ATH 1.0 1 1 1 0 2 1
2026-06-14 vs MIA 1.1 0 0 0 2 1 0
2026-05-17 vs PHI 1.0 1 0 0 0 0 0
2026-05-16 vs PHI 1.1 0 0 0 1 2 0
2026-05-10 @ SF 0.1 3 2 2 0 0 0
2026-05-07 @ AZ 0.1 0 0 0 0 1 0
2026-04-30 vs STL 0.2 3 5 5 2 0 0
2026-04-27 vs STL 0.1 0 0 0 0 1 0
2026-04-25 @ MIL 1.0 0 0 0 0 0 0
2026-04-24 @ MIL 1.0 0 0 0 1 1 0
2026-04-19 vs TB 1.0 0 0 0 0 1 0
2026-04-18 vs TB 1.0 0 0 0 0 0 0
2026-04-16 vs WSH 1.0 0 0 0 1 0 0
2026-04-14 vs WSH 2.0 2 0 0 0 1 0
2026-04-11 @ CHC 1.0 2 0 0 0 1 0
2026-04-10 @ CHC 1.0 0 0 0 1 0 0
2026-04-07 vs SD 0.2 1 0 0 0 0 0
2026-04-06 vs SD 1.0 2 0 0 0 2 0
2026-04-04 vs BAL 1.0 1 0 0 1 1 0
2026-04-01 @ CIN 1.1 1 0 0 0 0 0
2026-03-30 @ CIN 1.0 0 0 0 1 1 0
2026-03-29 @ NYM 1.0 0 0 0 0 2 0
2026-03-26 @ NYM 0.2 3 2 2 2 1 0
Transactions
Entire history • newest first.
2026-09-28
Pittsburgh Pirates activated RHP Isaac Mattson from the 15-day injured list.
2026-09-08
Pittsburgh Pirates placed RHP Isaac Mattson on the 15-day injured list. Right hip impingement.
2026-09-04
Pittsburgh Pirates recalled RHP Isaac Mattson from Indianapolis Indians.
2026-08-18
Pittsburgh Pirates optioned RHP Isaac Mattson to Indianapolis Indians.
2026-08-13
Pittsburgh Pirates recalled RHP Isaac Mattson from Indianapolis Indians.
2026-08-02
Pittsburgh Pirates optioned RHP Isaac Mattson to Indianapolis Indians.
2026-08-01
Pittsburgh Pirates recalled RHP Isaac Mattson from Indianapolis Indians.
2026-07-29
Pittsburgh Pirates optioned RHP Isaac Mattson to Indianapolis Indians.
2026-06-13
Pittsburgh Pirates recalled RHP Isaac Mattson from Indianapolis Indians.
2026-05-20
Pittsburgh Pirates optioned RHP Isaac Mattson to Indianapolis Indians.
2026-04-16
RHP Isaac Mattson changed number to 72.
2026-04-15
RHP Isaac Mattson changed number to 42.
2025-09-16
RHP Isaac Mattson changed number to 72.
2025-09-15
RHP Isaac Mattson changed number to 21.
2025-06-07
Pittsburgh Pirates recalled RHP Isaac Mattson from Indianapolis Indians.
2025-05-26
Pittsburgh Pirates optioned RHP Isaac Mattson to Indianapolis Indians.
2025-05-20
Pittsburgh Pirates selected the contract of RHP Isaac Mattson from Indianapolis Indians.
2025-01-13
RHP Isaac Mattson roster status changed by Pittsburgh Pirates.
2024-11-18
Pittsburgh Pirates signed free agent RHP Isaac Mattson to a minor league contract.
2024-11-04
Pittsburgh Pirates sent RHP Isaac Mattson outright to Indianapolis Indians.
2024-09-19
Pittsburgh Pirates selected the contract of RHP Isaac Mattson from Indianapolis Indians.
2024-02-24
RHP Isaac Mattson assigned to Pittsburgh Pirates.
2023-12-11
Pittsburgh Pirates signed free agent RHP Isaac Mattson to a minor league contract.
2023-06-22
Minnesota Twins signed free agent RHP Isaac Mattson to a minor league contract.
2022-04-08
Baltimore Orioles sent RHP Isaac Mattson outright to Norfolk Tides.
2022-04-08
Baltimore Orioles recalled RHP Isaac Mattson from Norfolk Tides.
2022-04-06
Baltimore Orioles optioned RHP Isaac Mattson to Norfolk Tides.
2021-10-01
Baltimore Orioles recalled RHP Isaac Mattson from Norfolk Tides.
2021-08-12
Baltimore Orioles optioned RHP Isaac Mattson to Norfolk Tides.
2021-08-07
Baltimore Orioles recalled RHP Isaac Mattson from Norfolk Tides.
2021-07-04
Baltimore Orioles optioned RHP Isaac Mattson to Norfolk Tides.
2021-06-30
Baltimore Orioles recalled RHP Isaac Mattson from Norfolk Tides.
2021-05-08
Baltimore Orioles optioned RHP Isaac Mattson to Norfolk Tides.
2021-05-03
Baltimore Orioles recalled RHP Isaac Mattson from Orioles Alternate Training Site.
2021-03-13
Baltimore Orioles optioned P Isaac Mattson to Norfolk Tides.
2020-11-20
Baltimore Orioles selected the contract of RHP Isaac Mattson.
2020-11-20
Baltimore Orioles selected the contract of RHP Isaac Mattson from Bowie Baysox.
2020-07-10
Baltimore Orioles invited non-roster RHP Isaac Mattson to spring training.
2020-03-07
RHP Isaac Mattson assigned to Baltimore Orioles.
2019-12-04
Baltimore Orioles traded RHP Dylan Bundy to Los Angeles Angels for RHP Isaac Mattson, RHP Kyle Bradish, RHP Kyle Brnovich and RHP Zach Peek.
2019-03-22
RHP Isaac Mattson assigned to Los Angeles Angels.
2017-06-18
Los Angeles Angels signed RHP Isaac Mattson.
Scouting Report
Statcast-style percentiles • Basenerd theme
Season 2026
Ready
Basic Line
Season / Game
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Pitch Arsenal
Usage • Velo • Break • Spin • xwOBA
Pitch N Use% Velo HB IVB Spin xwOBA Whiff% Zone% Chase% BNStuff+ BNCtrl+
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Notes
Primary pitch summary
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Movement Profile (Induced Break)
Pitcher's View: HB vs Rise / Drop (in)
Circles: 12/18/24 in • Dots = pitch types (size ~ pitch count)
Pitch Location Heatmaps
KDE-style blur • fixed zone • catcher POV
vs. LHH
vs. RHH
Zone: left -0.7083 / right 0.7083 • bot 1.595 / top 3.394 • Domain: X [-2,2], Z [0,5]
Statcast Game Log
Per-game pitch metrics from Statcast
Date Pitches Velo BNStuff+ BNCtrl+ Whiff% Zone% Chase% K% BB% xwOBA
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