ERA+
Billy Koch · Season-by-season history
ERA+ over time
- Toronto Blue Jays · MLB
- Athletics · 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+ |
|---|---|---|---|
| 2004 |  Chicago White Sox |
MLB | 88 |
| 2003 | Chicago White Sox |
MLB | 81 |
| 2002 |  Athletics |
MLB | 133 |
| 2001 |  Toronto Blue Jays |
MLB | 96 |
| 2000 | Toronto Blue Jays |
MLB | 193 |
| 1999 | Toronto Blue Jays |
MLB | 144 |