ERA
Jason Vargas · Season-by-season history
ERA over time
- Seattle Mariners · MLB
- Los Angeles Angels · MLB
- Kansas City Royals · MLB
| Season | Team | League | ERA |
|---|---|---|---|
| 2017 |  Kansas City Royals |
MLB | 4.16 |
| 2016 | Kansas City Royals |
MLB | 2.25 |
| 2015 | Kansas City Royals |
MLB | 3.98 |
| 2014 | Kansas City Royals |
MLB | 3.71 |
| 2013 |  Los Angeles Angels |
MLB | 4.02 |
| 2012 |  Seattle Mariners |
MLB | 3.85 |
| 2011 | Seattle Mariners |
MLB | 4.25 |
| 2010 | Seattle Mariners |
MLB | 3.78 |
| 2009 | Seattle Mariners |
MLB | 4.91 |