Jackson Kowar #37
Seattle Mariners
- P
- B/T: R/R
- 6' 5"/200
- Age: 29
- Jackson Alexander Kowar
- Status: Active
- Born: 10/04/1996 in Weddington, NC
- Draft: 2018, Kansas City Royals, Round: 1C, Overall Pick: 33
- College: Florida
- MLB Debut: 6/07/2021
2025 Stats
| G | W-L | ERA | IP | SO | WHIP |
|---|---|---|---|---|---|
| 18 | 1-0 | 2.81 | 16.0 | 16 | 1.31 |
2025 Stats
| G | W-L | ERA | IP | SO | WHIP |
|---|---|---|---|---|---|
| 15 | 2-0 | 4.24 | 17.0 | 15 | 1.24 |
MiLB Career Stats
| G | W-L | ERA | IP | SO | WHIP |
|---|---|---|---|---|---|
| 120 | 23-30 | 4.30 | 400.0 | 434 | 1.39 |
MLB Career Stats
| G | W-L | ERA | IP | SO | WHIP |
|---|---|---|---|---|---|
| 54 | 4-6 | 8.21 | 91.0 | 90 | 1.93 |
| Year | W | L | ERA | G | GS | SV | IP | SO | WHIP |
|---|---|---|---|---|---|---|---|---|---|
| 2025 MiLB Stats | 1 | 0 | 2.81 | 18 | 2 | 2 | 16.0 | 16 | 1.31 |
| 2025 MLB Stats | 2 | 0 | 4.24 | 15 | 0 | 0 | 17.0 | 15 | 1.24 |
| MiLB Career Stats | 23 | 30 | 4.30 | 120 | 74 | 4 | 400.0 | 434 | 1.39 |
| MLB Career Stats | 4 | 6 | 8.21 | 54 | 8 | 0 | 91.0 | 90 | 1.93 |
- Next Game:
Splits
| Duration | W | L | ERA | G | GS | SV | IP | H | ER | BB | SO | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Last 7 Games | 1 | 0 | 7.36 | 7 | 0 | 0 | 7.1 | 8 | 6 | 3 | 7 | 1.50 |
| Last 15 Games | 2 | 0 | 4.24 | 15 | 0 | 0 | 17.0 | 14 | 8 | 7 | 15 | 1.24 |
| Last 30 Games | - | - | --- | - | - | - | --- | - | - | - | - | --- |
| Last 3 Games | W | L | SV | IP | H | ER | BB | SO |
|---|---|---|---|---|---|---|---|---|
| 8/18 @ PHI | 0 | 0 | 0 | 1.0 | 2 | 1 | 2 | 1 |
| 8/17 @ NYM | 0 | 0 | 0 | 1.0 | 1 | 0 | 1 | 2 |
| 8/15 @ NYM | 0 | 0 | 0 | 0.1 | 3 | 3 | 0 | 1 |
2025 :
RP
(15)
More Jackson Kowar
Jackson Kowar pitches a clean inning of relief
Princely trio of sluggers ready to become Royals
Royals’ McBroom recalls wild long ball
Jackson Kowar strikes out 8 over 5 scoreless innings
Kowar ties career high with 10th K for Omaha
Omaha's Kowar fans 10 I-Cubs
State of the System: Kansas City Royals
Naturals' Kowar notches sixth strikeout with heater
Kowar goes eight in Naturals' shutout
Latest Transactions
| Team | Date | Transaction |
|---|---|---|
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October 21, 2025 | Seattle Mariners activated RHP Jackson Kowar. |
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October 4, 2025 | RHP Jackson Kowar roster status changed by Seattle Mariners. |
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September 29, 2025 | Seattle Mariners activated RHP Jackson Kowar. |
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August 22, 2025 | Tacoma Rainiers activated RHP Jackson Kowar. |
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August 19, 2025 | Seattle Mariners placed RHP Jackson Kowar on the 15-day injured list. Right shoulder impingement. |
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August 19, 2025 | Seattle Mariners optioned RHP Jackson Kowar to Tacoma Rainiers. |
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August 1, 2025 | Seattle Mariners recalled RHP Jackson Kowar from Tacoma Rainiers. |
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July 30, 2025 | Seattle Mariners optioned RHP Jackson Kowar to Tacoma Rainiers. |
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July 24, 2025 | Seattle Mariners recalled RHP Jackson Kowar from Tacoma Rainiers. |
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June 16, 2025 | Seattle Mariners optioned RHP Jackson Kowar to Tacoma Rainiers. |
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May 28, 2025 | Seattle Mariners activated RHP Jackson Kowar from the 60-day injured list. |
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May 10, 2025 | Seattle Mariners sent RHP Jackson Kowar on a rehab assignment to Tacoma Rainiers. |
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May 3, 2025 | Seattle Mariners sent RHP Jackson Kowar on a rehab assignment to ACL Mariners. |
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May 3, 2025 | Seattle Mariners sent RHP Jackson Kowar on a rehab assignment to ACL Mariners. |
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March 2, 2025 | Seattle Mariners placed RHP Jackson Kowar on the 60-day injured list. Tommy John surgery recovery. |
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November 4, 2024 | Seattle Mariners activated RHP Jackson Kowar from the 60-day injured list. |
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March 10, 2024 | Seattle Mariners placed RHP Jackson Kowar on the 60-day injured list. Right ulnar collateral ligament tear. |
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December 3, 2023 | Seattle Mariners activated RHP Jackson Kowar. |
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December 3, 2023 | Atlanta Braves traded RHP Cole Phillips and RHP Jackson Kowar to Seattle Mariners for LHP Marco Gonzales, OF Jarred Kelenic and 1B Evan White. |
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November 17, 2023 | Atlanta Braves traded RHP Kyle Wright to Kansas City Royals for RHP Jackson Kowar. |
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August 17, 2023 | Kansas City Royals recalled RHP Jackson Kowar from Omaha Storm Chasers. |
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August 2, 2023 | Omaha Storm Chasers activated RHP Jackson Kowar. |
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August 2, 2023 | Kansas City Royals optioned RHP Jackson Kowar to Omaha Storm Chasers. |
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August 1, 2023 | Kansas City Royals reassigned RHP Jackson Kowar to the minor leagues. |
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August 1, 2023 | Kansas City Royals recalled RHP Jackson Kowar from Omaha Storm Chasers. |
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June 24, 2023 | Kansas City Royals optioned RHP Jackson Kowar to Omaha Storm Chasers. |
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June 2, 2023 | Kansas City Royals recalled RHP Jackson Kowar from Omaha Storm Chasers. |
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May 20, 2023 | Omaha Storm Chasers activated RHP Jackson Kowar. |
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May 20, 2023 | Kansas City Royals optioned RHP Jackson Kowar to Omaha Storm Chasers. |
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May 16, 2023 | Kansas City Royals recalled RHP Jackson Kowar from Omaha Storm Chasers. |
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March 15, 2023 | Omaha Storm Chasers activated RHP Jackson Kowar. |
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March 15, 2023 | Kansas City Royals optioned RHP Jackson Kowar to Omaha Storm Chasers. |
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October 6, 2022 | Kansas City Royals recalled RHP Jackson Kowar from Omaha Storm Chasers. |
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July 30, 2022 | Kansas City Royals optioned RHP Jackson Kowar to Omaha Storm Chasers. |
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July 27, 2022 | Kansas City Royals recalled RHP Jackson Kowar from Omaha Storm Chasers. |
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July 26, 2022 | Kansas City Royals optioned RHP Jackson Kowar to Omaha Storm Chasers. |
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June 26, 2022 | Kansas City Royals recalled RHP Jackson Kowar from Omaha Storm Chasers. |
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April 11, 2022 | Kansas City Royals optioned RHP Jackson Kowar to Omaha Storm Chasers. |
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September 1, 2021 | Kansas City Royals recalled RHP Jackson Kowar from Omaha Storm Chasers. |
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June 23, 2021 | Kansas City Royals optioned RHP Jackson Kowar to Omaha Storm Chasers. |
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June 7, 2021 | Kansas City Royals selected the contract of RHP Jackson Kowar from Omaha Storm Chasers. |
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April 29, 2021 | RHP Jackson Kowar assigned to Omaha Storm Chasers from Royals Alternate Training Site. |
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February 5, 2021 | P Jackson Kowar assigned to Kansas City Royals . |
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February 5, 2021 | Kansas City Royals invited non-roster RHP Jackson Kowar to spring training. |
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February 5, 2021 | Kansas City Royals invited non-roster RHP Jackson Kowar to spring training. |
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October 6, 2020 | RHP Jackson Kowar assigned to Northwest Arkansas Naturals from Royals Alternate Training Site. |
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July 18, 2020 | RHP Jackson Kowar assigned to Royals Alternate Training Site from Northwest Arkansas Naturals. |
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January 13, 2020 | Kansas City Royals invited non-roster RHP Jackson Kowar to spring training. |
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June 22, 2019 | RHP Jackson Kowar assigned to Northwest Arkansas Naturals from Wilmington Blue Rocks. |
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April 1, 2019 | RHP Jackson Kowar assigned to Wilmington Blue Rocks from Lexington Legends. |
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July 12, 2018 | RHP Jackson Kowar assigned to Lexington Legends. |
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July 2, 2018 | Kansas City Royals signed RHP Jackson Kowar. |
+ Show More Transactions
Awards
CAR Mid-Season All-Star
| Year | ||
|---|---|---|
| 2019 | Wilmington Blue Rocks | CAR |
INT Pitcher of the Month
| Month | ||
|---|---|---|
| 05/2021 | Omaha Storm Chasers | AAA E |
INT Pitcher of the Year
| Year | ||
|---|---|---|
| 2021 | Omaha Storm Chasers | AAA E |
INT Post-Season All-Star
| Year | ||
|---|---|---|
| 2021 | Omaha Storm Chasers | AAA E |
MiLB.com Organization All-Star
| Year | ||
|---|---|---|
| 2021 | Kansas City Royals | AL |