Jackson Kowar
24-Year-Old PitcherSP
Kansas City Royals AAA
2021 Fantasy Outlook
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. Read Past Outlooks
RANKSFrom Preseason
#600
ADP
$Signed a one-year contract with the Royals in June of 2021.
Banished to minors
PKansas City Royals  AAA
June 23, 2021
The Royals optioned Kowar to Triple-A Omaha on Wednesday.
ANALYSIS
The writing was on the wall for Kowar's demotion after the Royals shifted him to the bullpen after a disastrous first two starts following his June 7 promotion from Triple-A Omaha. After giving up eight earned runs while recording only six outs between the two starts, Kowar fared only marginally better in long relief Saturday against the Red Sox, surrendering two runs on three hits over two innings. He'll slot back into the rotation at Omaha and will look to recapture some success before the Royals entertain the idea of calling him up again.
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Pitching Stats
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2021
2021 MLB Game Log
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Pitching Appearances Breakdown
Average Pitch Count
46
Last 10 Games
46
Last 5 Games
46
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+
 
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+
 
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
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
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 2019
 
 
-5%
BAA vs LHP
2021
 
 
-5%
BAA vs LHP
2020
No Stats
2019
No Stats
BAA Batters K BB H 2B 3B HR
Since 2019vs Left .444 14 1 4 4 1 0 0
Since 2019vs Right .467 17 1 1 7 1 0 1
2021vs Left .444 14 1 4 4 1 0 0
2021vs Right .467 17 1 1 7 1 0 1
2020vs Left 0 0 0 0 0 0 0 0
2020vs Right 0 0 0 0 0 0 0 0
2019vs Left 0 0 0 0 0 0 0 0
2019vs Right 0 0 0 0 0 0 0 0
More Splits View More Split Stats
Home/Away Pitching Splits
Since 2019
 
 
-83%
ERA at Home
2021
 
 
-83%
ERA at Home
2020
No Stats
2019
No Stats
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2019Home 6.00 1.00 3.0 0 0 0 3.0 0.0 3.0
Since 2019Away 36.00 6.50 2.0 0 2 0 4.5 22.5 0.0
2021Home 6.00 1.00 3.0 0 0 0 3.0 0.0 3.0
2021Away 36.00 6.50 2.0 0 2 0 4.5 22.5 0.0
2020Home 0 0 0 0 0 0 0 0 0
2020Away 0 0 0 0 0 0 0 0 0
2019Home 0 0 0 0 0 0 0 0 0
2019Away 0 0 0 0 0 0 0 0 0
More Splits View More Split Stats
Stat Review
How does Jackson Kowar compare to other starting pitchers?
This section compares his stats with all starting pitcher seasons from the previous three seasons (minimum 120 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 120 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
  • K/BB
    Strikeout to walk ratio.
  • K/9
    Average strikeouts per nine innings.
  • BB/9
    Average walks per nine innings.
  • HR/9
    Average home runs allowed per nine innings.
  • Fastball
    Average fastball velocity.
  • ERA
    Earned run average. The average earned runs allowed per nine innings.
  • WHIP
    Walks plus hits per inning pitched.
  • BABIP
    Batting average on balls in play. Measures how many balls in play against a pitcher go for hits.
  • GB/FB
    Groundball to flyball ratio. The higher the number, the more likely a pitcher is to induce groundballs.
  • Left On Base
    The percentage of base runners that a pitcher strands on base over the course of a season.
  • Exit Velocity
    The speed of the baseball as it comes off the bat, immediately after a batter makes contact.
  • Barrels/BBE
    The percentage of batted ball events resulting in a Barrel. A Barrel is a batted ball with similar exit velocity and launch angle to past ones that led to a minimum .500 batting average and 1.500 slugging percentage.
  • Spin Rate
    Spin Rate is the rate of spin on a baseball after it is released. It is measured in revolutions per minute (rpm).
  • Balls Hit 95+ MPH
    The percentage of batted balls hit that met or exceeded the 95 MPH threshold.
  • Swinging Strike
    The percentage of pitches that result in a swing and a miss.
K/BB
0.40
 
K/9
3.6
 
BB/9
9.0
 
HR/9
1.8
 
Fastball
96.0 mph
 
ERA
18.00
 
WHIP
3.20
 
BABIP
.452
 
GB/FB
2.00
 
Left On Base
41.1%
 
Exit Velocity
83.5 mph
 
Barrels/BBE
6.5%
 
Spin Rate
2256 rpm
 
Balls Hit 95+ MPH
22.6%
 
Swinging Strike
5.8%
 
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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2020 Fantasy Outlook
Part of the Royals' potentially historic 2018 pitcher-heavy draft class, Kowar has been incredibly consistent on his march to the majors. He made 13 starts apiece at High-A and Double-A, logging almost identical ERA, FIP, WHIP and GB% at both stops. Kowar increased his dominance and efficiency (14.1 K-BB% at High-A, 18.4 K-BB% at Double-A) against tougher competition, and should begin his age-23 season at Triple-A. His 70-grade changeup may be the best pitch of any of the pitchers Kansas City selected in that draft. Hitters can't just sit on his low-to-mid-90s fastball, because if they do, his changeup will eat them alive. His fringe-average breaking ball is a distant third pitch, and its development will be critical to Kowar becoming a good No. 3 starter, rather than an acceptable No. 4 starter. His above-average control and advanced pitchability should allow him to make the most of his arsenal.
More Fantasy News
Logs three innings in relief
PKansas City Royals  AAA
June 19, 2021
Kowar allowed two runs on three hits and struck out one in three innings in Saturday's 7-1 loss to Boston.
ANALYSIS
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Available out of bullpen Friday
PKansas City Royals  AAA
June 18, 2021
Kowar will be available to pitch in relief Friday against the Red Sox, Lynn Worthy of The Kansas City Star reports.
ANALYSIS
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Not starting Friday
PKansas City Royals  AAA
June 18, 2021
Kowar will not start Friday's game against the Red Sox.
ANALYSIS
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Poor performance once again
PKansas City Royals  AAA
June 12, 2021
Kowar (0-2) was tagged with the loss Saturday against the Athletics after allowing four runs on five hits and three walks across 1.1 innings. He struck out one.
ANALYSIS
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Gets another shot after rough debut
PKansas City Royals  AAA
June 9, 2021
Kowar is scheduled to start Saturday's game in Oakland, Lynn Worthy of The Kansas City Star reports.
ANALYSIS
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