ERA+
Corey Kluber · Season-by-season history
ERA+ over time
- Cleveland Guardians · MLB
- New York Yankees · MLB
- Tampa Bay Rays · MLB
- Boston Red Sox · 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+ |
|---|---|---|---|
| 2023 |  Boston Red Sox |
MLB | 65 |
| 2022 |  Tampa Bay Rays |
MLB | 84 |
| 2021 |  New York Yankees |
MLB | 112 |
| 2019 |  Cleveland Guardians |
MLB | 82 |
| 2018 | Cleveland Guardians |
MLB | 150 |
| 2017 | Cleveland Guardians |
MLB | 202 |
| 2016 | Cleveland Guardians |
MLB | 144 |
| 2015 | Cleveland Guardians |
MLB | 123 |
| 2014 | Cleveland Guardians |
MLB | 160 |
| 2013 | Cleveland Guardians |
MLB | 99 |
| 2012 | Cleveland Guardians |
MLB | 76 |
| 2011 | Cleveland Guardians |
MLB | 51 |