Detail: Isaac Mattson

Team	Pirates	Position	RP	Depth	2nd at RP
Height	6-2	Weight	215	Birthday	1995-07-14	Age	30.2
Bats	R	Throws	R	Roto Transactions
Roto Status	Free Agent	Pro Status	Active

Statistics

Year	Team	G	IP	BF	H	HR	K	BB	IBB	HB	ER	Win	Sav	WHIP	ERA	BABIP	FIP	kwERA
2025	Pirates	40	44.00	183	31	3	45	18	2	2	11	3	0	1.114	2.25	.243	3.17	3.61
2024	Pirates	3	5.33	23	1	0	6	5	0	1	3	0	0	1.125	5.06	.091	4.22	5.40
2021	Orioles	4	4.33	23	5	0	3	5	0	0	3	0	0	2.308	6.23	.333	5.18	6.44
Total MLB		47	53.67	229	37	3	54	28	2	3	17	3	0	1.211	2.85	.241	3.44	4.08
2025	Spring	3	4.00	0	2	1	4	2	0	0	2	1	0	1.000	4.50	n.a.	5.85	n.a.

2025 Projections
Source		G	IP	BF	H	HR	K	BB	IBB	HB	ER	Win	Sav	WHIP	ERA	BABIP	FIP	kwERA
Consensus		15	24.06	106	22	3	23	13	0	2	12	1	0	1.449	4.52	.291	4.56	4.41
RV Current		31	63.76	272	56	7	63	27	2	3	27	4	3	1.300	3.80	.288	3.82	3.86
RotoValue		12	13.48	55	11	2	13	6	0	1	6	1	1	1.270	3.83	.288	4.14	3.90
Steamer		1	1.00	4	1	0	1	1	0	0	1	0	0	1.477	4.62	.292	4.60	4.37
ZiPS		33	57.70	258	53	7	56	33	0	4	30	3	0	1.490	4.68	.291	4.66	4.52
modZiPS		33	57.70	258	53	7	56	33	0	4	30	3	0	1.490	4.68	.291	4.66	4.52

2025 Game Log

September		Pos	IP	BF	H	HR	K	BB	IBB	HB	ER	Win	Sav	WHIP	ERA	BABIP	FIP	kwERA
2025-09-14	@ Wsh	RP	2.00	8	1	0	1	1	0	0	0	0	0	1.000	0.00	.167	3.60	5.40
2025-09-10	@ Bal	RP	1.00	6	3	0	0	0	0	0	1	0	0	3.000	9.00	.500	3.10	5.40
2025-09-09	@ Bal	RP	1.00	5	0	0	1	2	1	0	0	0	0	2.000	0.00	.000	4.10	5.40
2025-09-07	v Mil	RP	1.00	5	0	0	1	2	0	0	0	0	0	2.000	0.00	.000	7.10	7.80
2025-09-03	v LAD	RP	1.00	3	0	0	1	0	0	0	0	0	0	0.000	0.00	.000	1.10	1.40
2025-09-02	v LAD	RP	1.00	6	3	0	0	0	0	0	2	0	0	3.000	18.00	.500	3.10	5.40
Total			7.00	33	7	0	4	5	1	0	3	0	0	1.714	3.86	.292	3.67	5.40
August		Pos	IP	BF	H	HR	K	BB	IBB	HB	ER	Win	Sav	WHIP	ERA	BABIP	FIP	kwERA
2025-08-29	@ Bos	RP	1.00	4	1	0	1	0	0	0	0	0	0	1.000	0.00	.333	1.10	2.40
2025-08-27	@ StL	RP	1.00	3	0	0	1	0	0	0	0	0	0	0.000	0.00	.000	1.10	1.40
2025-08-26	@ StL	RP	1.00	3	0	0	1	0	0	0	0	0	0	0.000	0.00	.000	1.10	1.40
2025-08-24	v Col	RP	1.00	3	0	0	1	0	0	0	0	0	0	0.000	0.00	.000	1.10	1.40
2025-08-20	v Tor	RP	1.00	4	0	0	1	0	0	1	0	0	0	0.000	0.00	.000	4.10	5.40
2025-08-17	@ ChC	RP	1.00	6	2	0	0	1	1	0	1	0	0	3.000	9.00	.400	3.10	5.40
2025-08-15	@ ChC	RP	1.67	8	2	0	1	1	0	0	0	0	0	1.800	0.00	.333	3.70	5.40
2025-08-13	@ Mil	RP	1.00	3	0	0	1	0	0	0	0	0	0	0.000	0.00	.000	1.10	1.40
2025-08-10	v Cin	RP	0.67	3	0	0	1	1	0	0	0	0	0	1.500	0.00	.000	4.60	5.40
2025-08-09	v Cin	RP	1.00	3	0	0	2	0	0	0	0	0	0	0.000	0.00	.000	-0.90	-2.60
2025-08-06	v SF	RP	0.33	4	2	0	0	1	0	0	1	0	0	9.000	27.00	.667	12.10	8.40
2025-08-03	@ Col	RP	1.00	5	0	0	1	1	0	0	0	0	0	1.000	0.00	.000	4.10	5.40
Total			11.67	49	7	0	11	5	1	1	2	0	0	1.029	1.54	.219	2.50	3.90
July		Pos	IP	BF	H	HR	K	BB	IBB	HB	ER	Win	Sav	WHIP	ERA	BABIP	FIP	kwERA
2025-07-30	@ SF	RP	2.00	8	2	0	3	0	0	0	0	1	0	1.000	0.00	.400	0.10	0.90
2025-07-28	@ SF	RP	1.00	3	0	0	2	0	0	0	0	0	0	0.000	0.00	.000	-0.90	-2.60
2025-07-25	v Ari	RP	1.00	5	2	0	1	0	0	0	0	0	0	2.000	0.00	.500	1.10	3.00
2025-07-22	v Det	RP	1.00	4	1	0	2	0	0	0	0	0	0	1.000	0.00	.500	-0.90	-0.60
2025-07-19	v CHW	RP	0.33	5	2	0	1	1	0	1	2	0	0	9.000	54.00	1.000	15.10	7.80
2025-07-18	v CHW	RP	1.00	3	0	0	0	0	0	0	0	0	0	0.000	0.00	.000	3.10	5.40
2025-07-09	@ KC	RP	1.00	6	2	1	1	1	0	0	1	0	0	3.000	9.00	.333	17.10	5.40
2025-07-08	@ KC	RP	0.00	1	1	0	0	0	0	0	0	0	0	Inf	0.00	1.000	3.10	5.40
2025-07-05	@ Sea	RP	1.33	4	0	0	3	0	0	0	0	0	0	0.000	0.00	.000	-1.40	-3.60
2025-07-02	v StL	RP	1.00	5	1	0	1	1	0	0	0	0	0	2.000	0.00	.333	4.10	5.40
2025-07-01	v StL	RP	1.00	5	0	0	0	2	0	0	0	1	0	2.000	0.00	.000	9.10	10.20
Total			10.67	49	11	1	14	5	0	1	3	2	0	1.500	2.53	.357	3.38	3.44
June		Pos	IP	BF	H	HR	K	BB	IBB	HB	ER	Win	Sav	WHIP	ERA	BABIP	FIP	kwERA
2025-06-27	v NYM	RP	1.33	5	1	0	3	0	0	0	0	0	0	0.750	0.00	.500	-1.40	-1.80
2025-06-23	@ Mil	RP	1.67	6	1	0	3	0	0	0	0	0	0	0.600	0.00	.333	-0.50	-0.60
2025-06-20	v Tex	RP	1.33	5	1	0	1	1	0	0	0	0	0	1.500	0.00	.333	3.85	5.40
2025-06-19	@ Det	RP	0.67	4	2	1	0	0	0	0	2	0	0	3.000	27.00	.333	22.60	5.40
2025-06-15	@ ChC	RP	2.00	6	0	0	0	0	0	0	0	0	0	0.000	0.00	.000	3.10	5.40
2025-06-12	@ ChC	RP	1.67	6	0	0	1	1	0	0	0	0	0	0.600	0.00	.000	3.70	5.40
2025-06-10	v Mia	RP	2.00	6	0	0	3	0	0	0	0	0	0	0.000	0.00	.000	0.10	-0.60
2025-06-07	v Phi	RP	1.00	3	0	0	1	0	0	0	0	1	0	0.000	0.00	.000	1.10	1.40
Total			11.67	41	5	1	12	2	0	0	2	1	0	0.600	1.54	.154	2.67	2.47
May		Pos	IP	BF	H	HR	K	BB	IBB	HB	ER	Win	Sav	WHIP	ERA	BABIP	FIP	kwERA
2025-05-25	v Mil	RP	1.33	5	0	0	1	1	0	0	0	0	0	0.750	0.00	.000	3.85	5.40
2025-05-23	v Mil	RP	0.67	2	0	0	1	0	0	0	0	0	0	0.000	0.00	.000	0.10	-0.60
2025-05-22	v Mil	RP	1.00	4	1	1	2	0	0	0	1	0	0	1.000	9.00	.000	12.10	-0.60
Total			3.00	11	1	1	4	1	0	0	1	0	0	0.667	3.00	.000	5.77	2.13
Preseason		Pos	IP	BF	H	HR	K	BB	IBB	HB	ER	Win	Sav	WHIP	ERA	BABIP	FIP	kwERA
2025-03-16	@ NYY	RP	2.00	0	0	0	4	1	0	0	0	1	0	0.500	0.00	n.a.	0.60	n.a.
2025-03-10	v Bal	RP	1.00	0	2	1	0	0	0	0	2	0	0	2.000	18.00	n.a.	16.10	n.a.
2025-03-06	@ Bal	RP	1.00	0	0	0	0	1	0	0	0	0	0	1.000	0.00	n.a.	6.10	n.a.
Total			4.00	0	2	1	4	2	0	0	2	1	0	1.000	4.50	n.a.	5.85	n.a.

2025 Games by Position

RP	40
40	consecutive relief appearances

Copyright © 2025 by Almaviva Software LLC. All rights reserved.
Fangraphs Depth Charts projections are a combination of ZiPS and Steamer projections with playing time allocated by Fangraphs staff.
MLB Depth charts are computed by RotoValue.
Steamer projections courtesy of Jared Cross, Dash Davidson, and Peter Rosenbloom.
ZiPS projections courtesty of Dan Szymborski of Baseball Think Factory and ESPN.
Fielding Independent Pitching or FIP, was developed by Tom Tango based on DIPS work by Voros McCracken.
Strike Zone ERA, or kwERA, was developed by Tom Tango, with inspiration from GuyM.
ZiPS projections courtesty of Dan Szymborski of Baseball Think Factory and ESPN. modZiPS applies RotoValue's save estimation model to ZiPS projections.

Weighted On Base Average, or wOBA, was developed by Tom Tango. RotoValue uses Version 2, but ignoring reached base on error before 2015.

Detail: Isaac Mattson

Statistics

2025 Game Log

Wed 17-Sep-2025 17:28:17