ERA+
Jesse Hahn · Season-by-season history
ERA+ over time
- Athletics · MLB
- Kansas City Royals · MLB
- Seattle Mariners · MLB
Hover over a bar for its value. Only numeric values with a recorded season are charted; missing seasons are not treated as zero.
| Season | Team | League | ERA+ |
|---|---|---|---|
| 2025 |  Seattle Mariners |
MLB | 75 |
| 2021 |  Kansas City Royals |
MLB | 37 |
| 2020 | Kansas City Royals |
MLB | 912 |
| 2019 | Kansas City Royals |
MLB | 38 |
| 2017 |  Athletics |
MLB | 79 |
| 2016 | Athletics |
MLB | 68 |
| 2015 | Athletics |
MLB | 117 |