ERA+
Joel Johnston · Season-by-season history
ERA+ over time
- Kansas City Royals · 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+ |
|---|---|---|---|
| 1995 |  Boston Red Sox |
MLB | 47 |
| 1992 |  Kansas City Royals |
MLB | 34 |
| 1991 | Kansas City Royals |
MLB | 1045 |