
Jackson Kowar
26-Year-Old
2023 Stats
W-L
0-0
ERA
0.00
WHIP
0.69
K
5
SV
0
Rest-of-Season Projections
2023 Fantasy Outlook
An ugly 2022 campaign took a lot of shine out of Kowar's prospect stock. He worked as a starter with Triple-A Omaha, but a 6.16 ERA and 1.66 WHIP over 83.1 innings at that level easily made his worst minor-league season. Despite the struggles, he also made seven relief appearances in the majors, and the results were even worse -- a 9.77 ERA and 2.43 WHIP across 15.2 innings. With 46 big-league innings to his name in the majors, it's too early to write off the right-hander, but it's fair to question if his stuff is good enough. His 96 mph fastball didn't miss many bats, though he uses a very effective changeup almost as often, with that pitch racking up a 35 whiff rate in the majors. He'll likely be in the minors or in the rotation in 2023, as the Royals will probably want to give him one more chance to prove himself as a starter, but he's got work to do. Read Past Outlooks
RANKSFrom Preseason
#601
ADP

Recalled from Triple-A
Kansas City recalled Kowar from Triple-A Omaha on Friday.
ANALYSIS
The 26-year-old right-hander will replace Amir Garrett, who is headed to the 15-day injured list with a left elbow injury. A former top prospect, Kowar projects to operate in long relief as he joins the Royals' major-league roster for the second time this season.
The 26-year-old right-hander will replace Amir Garrett, who is headed to the 15-day injured list with a left elbow injury. A former top prospect, Kowar projects to operate in long relief as he joins the Royals' major-league roster for the second time this season.
Pitching Stats
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2023
2022
2021
2023 MLB Game Log
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Minor League Game Log

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Pitching Appearances Breakdown
Average Pitch Count
31
Last 10 Games
31
Last 5 Games
31
How many pitches does Jackson Kowar generally throw?
1-10
11-20
21-30
31-40
41-50
51-60
61-70
71-80
81-90
91-100
101-110
111-120
121+
What part of the game does Jackson Kowar generally pitch?
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
Extra
% Games Reaching Innings Threshold
% Games By Number of Innings Pitched
Left/Right Pitching Splits
Since 2021
-13%
BAA vs RHP
2023
-100%
BAA vs LHP
BAA | K | BB | H | HR | ||||
---|---|---|---|---|---|---|---|---|
Since 2021vs Left | .363 | 15 | 18 | 29 | 6 | |||
Since 2021vs Right | .316 | 36 | 15 | 42 | 5 | |||
2023vs Left | .000 | 1 | 1 | 0 | 0 | |||
2023vs Right | .100 | 4 | 1 | 1 | 0 | |||
2022vs Left | .500 | 4 | 6 | 11 | 2 | |||
2022vs Right | .327 | 13 | 5 | 16 | 2 | |||
2021vs Left | .333 | 10 | 11 | 18 | 4 | |||
2021vs Right | .338 | 19 | 9 | 25 | 3 | |||
More Splits→ | View More Split Stats |
Home/Away Pitching Splits
Since 2021
-8%
ERA at Home
2023
No Stats
ERA | WHIP | IP | K/9 | BB/9 | |||||
---|---|---|---|---|---|---|---|---|---|
Since 2021Home | 9.51 | 2.11 | 29.1 | 9.5 | 5.5 | ||||
Since 2021Away | 10.29 | 2.00 | 21.0 | 8.6 | 6.4 | ||||
2023Home | 0.00 | 0.50 | 2.0 | 9.0 | 0.0 | ||||
2023Away | 0.00 | 0.86 | 2.1 | 11.6 | 7.7 | ||||
2022Home | 11.57 | 2.89 | 9.1 | 11.6 | 6.8 | ||||
2022Away | 7.11 | 1.74 | 6.1 | 7.1 | 5.7 | ||||
2021Home | 9.50 | 1.89 | 18.0 | 8.5 | 5.5 | ||||
2021Away | 13.86 | 2.35 | 12.1 | 8.8 | 6.6 | ||||
More Splits→ | View More Split Stats |
Stat Review
How does Jackson Kowar compare to other relievers?
This section compares his stats with all relief pitcher seasons from the previous three seasons (minimum 30 innings)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
K/BB
2.50K/9
10.4BB/9
4.2HR/9
0.0Fastball
97.1 mphERA
0.00WHIP
0.69BABIP
.122GB/FB
1.00Left On Base
100.0%Exit Velocity
84.1 mphBarrels/BBE
0.0%Spin Rate
2210 rpmBalls Hit 95+ MPH
22.2%Swinging Strike
9.8%Prospect Rankings History
Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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Past Fantasy Outlooks
2021
2020
Kowar hasn't been hyped up the way org. mates Asa Lacy and Daniel Lynch have, but with a mid-90s fastball and one of the best changeups in the minors, he belongs in that same conversation. His Florida teammate Brady Singer beat him to the majors, but Singer was always seen as a quick-to-the-majors guy, while Kowar was more of a high-upside pitcher who would require more development. A lean 6-foot-5, Kowar worked on repeating his delivery and honing his command at the alternate site. Perhaps most importantly, he made impressive strides with his third-pitch curveball. Royals officials think he only needs an average curve to pitch near the top of the rotation, thanks to the quality of his fastball and changeup. He should head to Triple-A and will join the big-league rotation whenever the team thinks his command and consistency warrant the promotion.
More Fantasy News

Sent back to Omaha
Kowar was optioned to Triple-A Omaha on Saturday.
ANALYSIS
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Recalled from Triple-A
The Royals recalled Kowar from Triple-A Omaha on Tuesday.
ANALYSIS
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Role undecided
Kowar's role moving forward has yet to be determined by the Royals, Anne Rogers of MLB.com reports.
ANALYSIS
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Optioned out to Triple-A
The Royals optioned Kowar to Triple-A Omaha on Wednesday.
ANALYSIS
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Optioned to Triple-A
Kowar was optioned to Triple-A Omaha on Saturday.
ANALYSIS
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