ERA+
Javier López · Season-by-season history
ERA+ over time
- Boston Red Sox · MLB
| Season | Team | League | ERA+ |
|---|---|---|---|
| 2009 |  Boston Red Sox |
MLB | 52 |
| 2008 | Boston Red Sox |
MLB | 191 |
| 2007 | Boston Red Sox |
MLB | 154 |
| 2006 | Boston Red Sox |
MLB | 179 |