ERA+
Dan Altavilla · Season-by-season history
ERA+ over time
- Seattle Mariners · MLB
- Kansas City Royals · MLB
- Chicago White Sox · MLB
Hover over a point for its value. Only numeric values with a recorded season are charted; missing seasons are not treated as zero.
| Season | Team | League | ERA+ |
|---|---|---|---|
| 2025 |  Chicago White Sox |
MLB | 170 |
| 2024 |  Kansas City Royals |
MLB | 31 |
| 2020 |  Seattle Mariners |
MLB | 57 |
| 2019 | Seattle Mariners |
MLB | 80 |
| 2018 | Seattle Mariners |
MLB | 158 |
| 2017 | Seattle Mariners |
MLB | 99 |
| 2016 | Seattle Mariners |
MLB | 571 |