Jackson
Kowar
PAge : 30Throws : R
#57
Jackson Kowar
#57P
Height : 6' 5" · Weight : 91 kg · Bats : R · Throws : R · MLB debut : 2021-06-07
Born in : Weddington, NC, USA
MLB record
| Year | Team | PJ | V | D | MPM | MJ | RB | WHIP |
|---|---|---|---|---|---|---|---|---|
| 2025 | Seattle Mariners | 15 | 2 | 0 | 4.24 | 17.0 | 15 | 1.24 |
| 2023 | Kansas City Royals | 23 | 2 | 0 | 6.43 | 28.0 | 29 | 1.93 |
| 2022 | Kansas City Royals | 7 | 0 | 0 | 9.77 | 15.2 | 17 | 2.43 |
| 2021 | Kansas City Royals | 9 | 0 | 6 | 11.27 | 30.1 | 29 | 2.08 |
| Career totals | 54 | 4 | 6 | 8.21 | 91.0 | 90 | 1.93 | |
Advanced stats, 2025 Relief pitcher
MLB stats →ERA
4.24
FIP
5.84
xFIP
5.23
ERA-
111
WHIP
1.24
K%
21.1 %
BB%
9.9 %
Strikeouts
15
Innings
17.0
Wins
2
Stats: MLB (statsapi) and Baseball Savant.
2026 projection
MLB trends →Projected WAR
-0.3
Strikeouts
20
2025 WAR
-0.2
This season's pace, over the average of the last two workloads, adjusted for next year's age.
Trend
→ Stable (-2)
- 2021-0.2 WAR · -0.4 per full season
- 2022-0.3 WAR
- 2023-0.2 WAR · -0.5 per full season
- 2025-0.2 WAR · -0.8 per full season
Outlook, age included
+8 · 28 y.o. · prime years
It is only a projection. It knows nothing about injuries, trades or role changes.
Player ratings, 2025
All ratings →Ratings from 0 to 100, computed from Statcast and MLB stats over four seasons, never by hand. 75 = established regular, 87 = 90th percentile, 95+ = elite.
OV · Overall
59
Replacement or prospect
- VEL
- Velocity
- 83
- STF
- Stuff
- 64
- CTL
- Control
- 60
- CNT
- Contact allowed
- 62
- STA
- Stamina
- —
- DUR
- Durability
- 51
- EX
- Experience
- 61
Why these ratings?Hide details
- VEL — Velocity : Fastball velocity
- STF — Stuff : Strikeouts, K − BB
- CTL — Control : Walks avoided
- CNT — Contact allowed : xwOBA, barrels and hard-hit balls allowed
- STA — Stamina : Innings per start and innings pitched
- DUR — Durability : Games played over several seasons
- EX — Experience : Seasons in the majors
WAR and PAL Rating, 2025
How we rate →WAR is fWAR (FanGraphs' version, distributed through MLB's API): wins added above a replacement player. PAL Rating scores performance from 0 to 100 against regulars in the same role (50 = median).
PAL: dimensions
A pitcher's WAR
Computed by MLB from FIP (strikeouts, walks, home runs). FIP: 5.84 · RA9-WAR: 0.0
Statcast
Statcast leaderboards →MLB's tracking of every ball, 2025 season. The percentile ranks the player among regulars in the role: 90th means better than 90% of them.
Fastball
97.3 mi/h
86th percentile
K%
21.1 %
37th percentile
BB%
9.9 %
31th percentile
xERA
5.16
8th percentile
xwOBA allowed
.348
8th percentile
Barrels allowed
10.4 %
15th percentile
| Season | Team | WAR | PAL | OV | Fastball | K% | BB% | xERA | xwOBA allowed |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | SEA | -0.2 | 24 | 59 | 97.3 | 21.1 | 9.9 | 5.16 | .348 |
| 2023 | KC | -0.2 | 13 | 53 | 96.9 | 21.2 | 14.6 | 4.51 | .326 |
| 2022 | KC | -0.3 | 6 | 45 | 95.8 | 20.7 | 13.4 | 6.23 | .380 |
| 2021 | KC | -0.2 | 1 | 51 | 95.6 | 18.8 | 13.0 | 7.25 | .398 |
Game log, 2025
| Date | Opponent | IP | H | ER | BB | SO | ERA |
|---|---|---|---|---|---|---|---|
| Aug 18 | @ PHI | 1.0 | 2 | 1 | 2 | 1 | 4.24 |
| Aug 17 | @ NYM | 1.0 | 1 | 0 | 1 | 2 | 3.94 |
| Aug 15 | @ NYM | 0.1 | 3 | 3 | 0 | 1 | 4.20 |
| Aug 14 | @ BAL | 1.0 | 0 | 0 | 0 | 1 | 2.45 |
| Aug 7 | vs CWS | 1.0 | 0 | 0 | 0 | 0 | 2.63 |
| Aug 5 | vs CWS | 1.0 | 2 | 2 | 0 | 1 | 2.84 |
| Jul 29 | @ ATH | 2.0 | 0 | 0 | 0 | 1 | 1.54 |
| Jul 27 | @ LAA | 1.0 | 1 | 0 | 1 | 0 | 1.86 |
| Jun 14 | vs CLE | 1.0 | 0 | 0 | 0 | 1 | 2.08 |
| Jun 10 | @ AZ | 2.0 | 1 | 1 | 0 | 3 | 2.35 |
Jackson Kowar in five questions
What is Jackson Kowar's record in 2025?
Jackson Kowar is 2-0 in 2025, with a 4.24 ERA and 15 strikeouts in 17.0 innings.
How old and how tall is Jackson Kowar?
Jackson Kowar is 30 years old (born October 4, 1996). He is 6'5" (196 cm) and weighs 201 lb (91 kg).
Where is Jackson Kowar from?
Jackson Kowar was born in Weddington, NC, United States.
How good is Jackson Kowar?
Jackson Kowar produced -0.2 wins above replacement (WAR) in 2025. His PAL rating is 24 out of 100: below average for his position.
What is Jackson Kowar's projection for 2026?
Our projection has him at -0.3 WAR in 2026, based on his weighted recent seasons and age.