ERA+

Zack Kelly · Season-by-season history

ERA+ over time

Zack Kelly — 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 24.4 48.8 73.2 97.6 122 2022 2023 2024 2025 2022 · Boston Red Sox · MLB: 109 Boston Red Sox 2023 · Boston Red Sox · MLB: 122 Boston Red Sox 2024 · Boston Red Sox · MLB: 105 Boston Red Sox 2025 · Boston Red Sox · MLB: 90 Boston Red Sox
  • Boston Red Sox · MLB
SeasonTeamLeagueERA+
2025 Boston Red Sox MLB 90
2024 Boston Red Sox MLB 105
2023 Boston Red Sox MLB 122
2022 Boston Red Sox MLB 109