Pro Baseball Terminal — MLB projections, standings & analytics

Jackson Kowar

P · SEA

29 yrs

Pitcher

Description

Position: P
Team: SEA
Type: Pitcher
Bats: Right
Throws: Right
Born: 1996-10-04
Age: 29
Country: USA
Height: 6'5"
Weight: 200 lb
Last active: 2025

Career Résumé

4 seasons

Seasons	4 2021–2025
Games	54
W-L	4-6
ERA	8.21
WHIP	1.93
IP	91
SO	90
SV	0

Pitching

Regular season

Season	Tm	W	L	ERA	WHIP	G	GS	IP	SO	BB	HR	ER	xERA	Brl%
2025	SEA	2	0	4.24	1.24	15	0	17.0	15	7	4	8	5.16	10.4%
2023	KC	2	0	6.43	1.93	23	0	28.0	29	20	4	20	4.51	5.7%
2022	KC	0	0	9.77	2.43	7	0	15.2	17	11	4	17	6.23	7.4%
2021	KC	0	6	11.27	2.08	9	8	30.1	29	20	7	38	7.25	11.7%

Season	Pos	G	GS	Inn	PO	A	FLD%	RF/9	OAA
2025	P	15	0	17.0	0	0	—	0.00	—
2023	P	23	0	28.0	1	1	1.000	0.64	—
2022	P	7	0	15.2	0	4	1.000	2.30	—
2021	P	9	8	30.1	0	7	1.000	2.08	—

Pitching game log

2025 · last 15

Date		Opp	Res	Dec	IP	H	R	ER	HR	BB	SO	Pit
2025-08-18	@	PHI	L	ND	1.0	2	1	1	0	2	1	30
2025-08-17	@	NYM	L	ND	1.0	1	0	0	0	1	2	18
2025-08-15	@	NYM	W	ND	0.1	3	3	3	1	0	1	9
2025-08-14	@	BAL	L	ND	1.0	0	0	0	0	0	1	10
2025-08-07	vs	CWS	W	W	1.0	0	0	0	0	0	0	11
2025-08-05	vs	CWS	W	ND	1.0	2	2	2	2	0	1	20
2025-07-29	@	ATH	L	ND	2.0	0	0	0	0	0	1	16
2025-07-27	@	LAA	L	ND	1.0	1	0	0	0	1	0	17
2025-06-14	vs	CLE	W	W	1.0	0	0	0	0	0	1	11
2025-06-10	@	AZ	L	ND	2.0	1	1	1	1	0	3	28
2025-06-07	@	LAA	L	ND	0.2	1	1	1	0	3	1	33
2025-06-06	@	LAA	L	ND	1.0	1	0	0	0	0	1	17
2025-06-03	vs	BAL	L	ND	2.0	0	0	0	0	0	1	26
2025-05-31	vs	MIN	W	H	1.0	1	0	0	0	0	0	19
2025-05-28	vs	WSH	L	ND	1.0	1	0	0	0	0	1	16

Pitching Profile2023 · vs 410

K/9

9.359

BB/9

6.40

HR/9

1.338

ERA

6.435

WHIP

1.930

xERA

4.5135

Brl%A

5.7%81

PlayerMedian (50th)percentile vs league

Career Highs

Stat	Best	Year
Wins	2	2025
SO	29	2023
SV	0	2025
ERA	4.24	2025
WHIP	1.24	2025

Comparable Players

2021 · stat-profile similarity

J. C. MejíaCLE29y
8.25 ERA · 47 K · 1.61 WHIP
70%
vs
Jake ArrietaSD40y
7.39 ERA · 83 K · 1.77 WHIP
69%
vs
Bryan GarciaDET31y
7.55 ERA · 32 K · 1.86 WHIP
69%
vs
Matt ShoemakerMIN39y
8.06 ERA · 40 K · 1.66 WHIP
68%
vs
Justus SheffieldSEA30y
6.83 ERA · 63 K · 1.84 WHIP
68%
vs

Career Arc

ERA by season · taller = better

Year over Year

pitching trajectory

Yr	Tm	W	ERA	WHIP	SO	IP
21	KC	0	11.27	2.08	29	30
22	KC	0	9.77▼	2.43▲	17▼	16▼
23	KC	2▲	6.43▼	1.93▼	29▲	28▲
25	SEA	2	4.24▼	1.24▼	15▼	17▼

Career Milestones

chase to the next mark

Wins4

46 to 50

Strikeouts90

910 to 1,000

Season

Pitch Arsenal

2025 · Statcast

Pitch	Use	Velo	Spin
4-Seam	58%	97.3	2167
Slider	36%	86.2	2507
Changeup	5%	87.0	2421

Plate Discipline

2025 · induced

27.5%

Chase

lg 28.5%

75.2%

Z-Swing

lg 67%

23.7%

Whiff

lg 24.5%

76.3%

Contact

lg 76%

42.9%

Zone

lg 48.5%

23.4%

CSW

lg 28%

282 pitches · green/red vs league avg

Statcast Trend

xERA by season · taller = better

Barrel% Against by season · taller = better

Per game	3.2
Ceiling (90th)	7.3
Floor (10th)	-0.9
Std dev	3.7
Boom rate	40%
Bust rate	33%
Profile	Volatile