ERA

Jackson Kowar · Season-by-season history

ERA over time

Jackson Kowar — ERA over time Each bar is a recorded season value, grouped by season and coloured by team and competition. Bars extend from zero. Focus or hover over a bar for its exact value. 0 2.25 4.51 6.76 9.02 11.27 2021 2022 2023 2025 2021 · Kansas City Royals · MLB: 11.27 Kansas City Royals 2022 · Kansas City Royals · MLB: 9.77 Kansas City Royals 2023 · Kansas City Royals · MLB: 6.43 Kansas City Royals 2025 · Seattle Mariners · MLB: 4.24 Seattle Mariners
  • Kansas City Royals · MLB
  • Seattle Mariners · MLB
SeasonTeamLeagueERA
2025 Seattle Mariners MLB 4.24
2023 Kansas City Royals MLB 6.43
2022 Kansas City Royals MLB 9.77
2021 Kansas City Royals MLB 11.27