ERA
Darren Oliver · Season-by-season history
ERA over time
- Texas Rangers · MLB
- Boston Red Sox · MLB
- Los Angeles Angels · MLB
- Toronto Blue Jays · 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 |
|---|---|---|---|
| 2013 |  Toronto Blue Jays |
MLB | 3.86 |
| 2012 | Toronto Blue Jays |
MLB | 2.06 |
| 2011 |  Texas Rangers |
MLB | 2.29 |
| 2010 | Texas Rangers |
MLB | 2.48 |
| 2009 |  Los Angeles Angels |
MLB | 2.71 |
| 2008 | Los Angeles Angels |
MLB | 2.88 |
| 2007 | Los Angeles Angels |
MLB | 3.78 |
| 2002 |  Boston Red Sox |
MLB | 4.66 |
| 2001 | Texas Rangers |
MLB | 6.02 |
| 2000 | Texas Rangers |
MLB | 7.42 |
| 1998 | Texas Rangers |
MLB | 6.53 |
| 1997 | Texas Rangers |
MLB | 4.20 |
| 1996 | Texas Rangers |
MLB | 4.66 |
| 1995 | Texas Rangers |
MLB | 4.22 |
| 1994 | Texas Rangers |
MLB | 3.42 |
| 1993 | Texas Rangers |
MLB | 2.70 |