ERA

Ronald Bolanos · Season-by-season history

ERA over time

Ronald Bolanos — 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 2.45 4.91 7.36 9.82 12.27 2020 2021 2022 2020 · Kansas City Royals · MLB: 12.27 Kansas City Royals 2021 · Kansas City Royals · MLB: 1.42 Kansas City Royals 2022 · Kansas City Royals · MLB: 4.42 Kansas City Royals
  • Kansas City Royals · MLB
SeasonTeamLeagueERA
2022 Kansas City Royals MLB 4.42
2021 Kansas City Royals MLB 1.42
2020 Kansas City Royals MLB 12.27