ERA
John Lackey · Season-by-season history
ERA over time
- Los Angeles Angels · MLB
- Boston Red Sox · MLB
| Season | Team | League | ERA |
|---|---|---|---|
| 2014 |  Boston Red Sox |
MLB | 3.60 |
| 2013 | Boston Red Sox |
MLB | 3.52 |
| 2011 | Boston Red Sox |
MLB | 6.41 |
| 2010 | Boston Red Sox |
MLB | 4.40 |
| 2009 |  Los Angeles Angels |
MLB | 3.83 |
| 2008 | Los Angeles Angels |
MLB | 3.75 |
| 2007 | Los Angeles Angels |
MLB | 3.01 |
| 2006 | Los Angeles Angels |
MLB | 3.56 |
| 2005 | Los Angeles Angels |
MLB | 3.44 |
| 2004 | Los Angeles Angels |
MLB | 4.67 |
| 2003 | Los Angeles Angels |
MLB | 4.63 |
| 2002 | Los Angeles Angels |
MLB | 3.66 |