Jackson Kowar SEA RP R

Born: 10/04/1996 Age: 28

On MLB 40-man: YES
Acquired: Trade (ATL) Dec'23

Sat 8/23	Sun 8/24	Mon 8/25
ATH 9:40 PM EDT	ATH 4:10 PM EDT	SDP 9:40 PM EDT

Positions
RP
2026 Earned Positions
RP

All Leagues
Average $0.00 Median $0.00
FanGraphs Points
Average $0.00 Median $0.00

All Leagues
Average $1.00 Median $1.00
FanGraphs Points
Average $1.30 Median $1.00

Roster%
0%
Change
7Day 0%
30Day 0%

2025 OPL Round 6
OPL Roster%
0.00%
OPL Average Salary
$0.00

August 19, 2025 4:09 PM : The Mariners optioned Kowar to Triple-A Tacoma on Tuesday.
Analysis: Kowar had allowed four runs over 2.1 innings covering his last three relief appearances. He'll head to Tacoma for now but could get another opportunity in the Seattle bullpen later on this season.

Year	Team	G	GS	IP	HLD	K	H	BB	HBP	HR	P/IP	Pts
2021	KCR	9	8	30.1	0	29	43	20	2	7	0.61	18.57
2022	KCR	7	0	15.2	2	17	27	11	0	4	0.35	5.53
2023	KCR	23	0	28.0	0	29	34	20	1	4	2.31	64.60
2025	SEA	15	0	17.0	1	15	14	7	1	4	2.95	50.20

Year	Team	G	GS	IP	SV	HLD	K	H	BB	HBP	HR	P/IP	Pts
2018	KCR (A)	9	9	26.1	0	0	22	19	12	0	2	4.89	128.87
2019	KCR (A+)	13	13	74.0	0	0	66	68	22	10	4	4.83	357.60
2019	KCR (AA)	13	13	74.1	0	0	78	73	21	2	8	4.69	348.87
2021	KCR (AAA)	17	16	80.2	0	0	115	66	34	4	7	5.64	455.23
2022	KCR (AAA)	20	20	83.1	0	0	88	95	43	8	14	2.65	220.47
2023	KCR (AAA)	30	1	45.1	2	3	49	51	32	6	4	3.52	159.67
2025	SEA (CPX)	2	2	2.0	0	0	1	2	0	0	0	5.8	11.60
2025	SEA (AAA)	16	0	14.0	2	2	15	9	10	2	0	6.59	92.20

Date	Team	Opponent	Win	IP	TBF	R	ER	H	K	BB	HR	Pts
Aug 18, 2025	SEA	@PHI	0	1.0	7	1	1	2	1	2	0	-1.80
Aug 17, 2025	SEA	@NYM	0	1.0	5	0	0	1	2	1	0	5.80
Aug 15, 2025	SEA	@NYM	0	0.1	4	3	3	3	1	0	1	-15.63
Aug 14, 2025	SEA	@BAL	0	1.0	3	0	0	0	1	0	0	9.40
Aug 7, 2025	SEA	CHW	1	1.0	3	0	0	0	0	0	0	7.40
Aug 5, 2025	SEA	CHW	0	1.0	5	2	2	2	1	0	2	-20.40
Jul 29, 2025	SEA	@ATH	0	2.0	6	0	0	0	1	0	0	16.80
Jul 27, 2025	SEA	@LAA	0	1.0	4	0	0	1	0	1	0	1.80
Jun 14, 2025	SEA	CLE	1	1.0	3	0	0	0	1	0	0	9.40
Jun 10, 2025	SEA	@ARI	0	2.0	7	1	1	1	3	0	1	5.90
Totals			2	11.1	47	7	7	10	11	4	4	18.67

Date	Level	Team	Opponent	Save	IP	TBF	R	ER	H	K	BB	HBP
Jul 19, 2025	AAA	TAC	ELP	0	1.0	3	0	0	0	2	0	0
Jul 13, 2025	AAA	TAC	@RNO	1	0.1	1	0	0	0	0	0	0
Jul 11, 2025	AAA	TAC	@RNO	0	1.0	7	2	2	2	2	2	0
Jul 8, 2025	AAA	TAC	@RNO	0	1.0	5	0	0	1	0	1	0
Jul 4, 2025	AAA	TAC	@SL	0	1.0	3	0	0	0	3	0	0
Jul 1, 2025	AAA	TAC	SL	0	1.0	5	0	0	0	0	1	1
Jun 28, 2025	AAA	TAC	@RR	0	0.2	6	4	1	1	1	2	0
Jun 21, 2025	AAA	TAC	ABQ	0	1.0	4	0	0	0	1	1	0
Jun 19, 2025	AAA	TAC	ABQ	1	1.0	4	0	0	1	2	0	0
Jun 17, 2025	AAA	TAC	ABQ	0	1.0	3	0	0	0	1	0	0
Totals				2	9.0	41	6	3	5	12	7	1

Date	Transaction Type	Team	Salary
September 27, 2020 12:04 PM	add	Wade Boggs Will Ride Again!	$1
September 30, 2020 7:55 PM	increase	Wade Boggs Will Ride Again!	$2
December 4, 2020 8:17 AM	cut	Wade Boggs Will Ride Again!	$0
May 24, 2021 7:31 AM	add	Gin and Fevertree Tonic	$3
August 1, 2021 11:13 AM	cut	Gin and Fevertree Tonic	$2

Date	Proposing Team	Proposing Team Gives	Accepting Team	Accepting Team Gives
December 16, 2021 10:29 PM	The Fish 🐠	Jackson Kowar KCR RP R $3	I Got Matsui. 🍶	Tommy Pham SDP OF R $11 Jesus Luzardo MIA SP L $9
December 9, 2021 10:56 AM	Callaway's Call Logs	Tony Gonsolin LAD SP R $8 60IL Jackson Kowar KCR RP R $3 Nolan Gorman STL 2B/3B L $5	A Sonny Gray in Glasnow	Sonny Gray CIN SP R $10
July 2, 2021 10:10 PM	Smoked City 🔥	James Kaprielian TOR CPX SP/RP R $2 Tanner Houck BOS SP R $1 60IL Jackson Kowar KCR RP R $1	The Crime Dogs	Gerrit Cole NYY SP R $42 60IL $38 loan
June 25, 2021 7:43 AM	3 days to D-day	Nate Pearson CHC AAA RP R $7 Alec Bohm PHI 1B/3B R $9 Jackson Kowar KCR RP R $6	RIP Bob Uecker	Anthony Rendon LAA 3B R $42 60IL $25 loan
June 4, 2021 7:38 AM	Big League Chew-pacabras	Giancarlo Stanton NYY OF R $29 Kenta Maeda NYY AAA SP/RP R $6 $13 loan	Eddie's Malort Bar	Kyle Schwarber WSN OF L $11 Jesus Sanchez MIA OF L $4 Jackson Kowar KCR RP R $1 Jarren Duran BOS OF L $2
May 24, 2021 8:33 PM	4 Baggers	Eduardo Escobar ARI Util S $1 Tim Anderson CHW 2B/SS R $6 Walker Buehler LAD SP R $18 $5 loan	He's a Moniak, MO-niak	Chris Paddack SDP SP R $10 Tommy Edman STL 2B/SS/3B/OF S $5 10IL Jackson Kowar KCR RP R $1 Triston Casas BOS 1B L $4 60IL

Jackson Kowar SEA RP R

Born: 10/04/1996 Age: 28

FanGraphs Player Page

OPL Player Page

On MLB 40-man: YES
Acquired: Trade (ATL) Dec'23

MLB Stats

Pitching

MILB Stats

Pitching

Recent Games

Last 10 MLB Games

Last 10 MILB Games

Avg Salary & Roster%

Last 30 days

2026 Position Eligibility Progress

To gain eligibility, a player must have 5 GS or 10 G at a position in the majors, or 20 G at a position in the minors.

Transaction History

Recent Trades for Jackson Kowar in FanGraphs Points

Cutting Players