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Jackson Kowar played 4 major-league seasons (2021-2025) as a P (54). Career totals and every year-by-year line below come from the SABR/Lahman database (CC BY-SA), covering 1871-2025.
Showing 4 season lines
| Year | Age | Team | G | GS | W | L | SV | IP | SO | BB | ERA | ERA+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021 | 25 | KCA | 9 | 8 | 0 | 6 | 0 | 30.1 | 29 | 20 | 11.27 | 38 |
| 2022 | 26 | KCA | 7 | 0 | 0 | 0 | 0 | 15.2 | 17 | 11 | 9.77 | 40 |
| 2023 | 27 | KCA | 23 | 0 | 2 | 0 | 0 | 28 | 29 | 20 | 6.43 | 67 |
| 2025 | 29 | SEA | 15 | 0 | 2 | 0 | 0 | 17 | 15 | 7 | 4.24 | 97 |
| Year | Pos | G | GS | PO | A | E | DP |
|---|---|---|---|---|---|---|---|
| 2021 | P | 9 | 8 | 0 | 7 | 0 | 0 |
| 2022 | P | 7 | 0 | 0 | 4 | 0 | 0 |
| 2023 | P | 23 | 0 | 1 | 1 | 0 | 0 |
| 2025 | P | 15 | 0 | 0 | 0 | 0 | 0 |
Team codes are the source codes (e.g. NYN for the New York Mets, BS1 for the 1875 Boston club). OPS+ is league-season normalized, not park-adjusted; unrecorded source values (such as RBI in the earliest recorded seasons) are absent, never zero-filled.
Jackson Kowar is a playable Legends Deck card, rated from real Statcast data and refreshed nightly: view the Jackson Kowar card.
Jackson Kowar appears in 2 archived official MLB transactions (1 trade), newest first.
| Date | Type | From | To | Details |
|---|---|---|---|---|
| Feb 14, 2026 | Trade | Minnesota Twins | Baltimore Orioles | Minnesota Twins traded RHP Jackson Kowar to Baltimore Orioles for cash. |
| Jul 2, 2018 | Signed | — | Kansas City Royals | Kansas City Royals signed RHP Jackson Kowar. |
From MLB’s official StatsAPI transactions feed (2011 to the current season, trades/signings/releases involving major-league clubs). Browse the full archive.
Every career total and season line is computed from the SABR / Sean Lahman baseball database (2025 edition, CC BY-SA 3.0), the same source behind our historical position leaderboards. Rate stats use league-season normalization only (OPS+ and ERA+ as marked, never park-adjusted); unrecorded early-era values stay absent rather than being invented. Career totals sum only what the source records.
Award winners and MVP / Cy Young / Rookie of the Year voting history come from the same database; the year pages live under MLB award voting history. Official transactions (2011 to the current season) come from the MLB StatsAPI feed on our transactions archive.