ERA+
Mark Guthrie · Season-by-season history
ERA+ over time
- Minnesota Twins · MLB
- Boston Red Sox · MLB
- Tampa Bay Rays · MLB
- Athletics · 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+ |
|---|---|---|---|
| 2001 |  Athletics |
MLB | 98 |
| 2000 |  Tampa Bay Rays |
MLB | 110 |
| 1999 |  Boston Red Sox |
MLB | 87 |
| 1995 |  Minnesota Twins |
MLB | 109 |
| 1994 | Minnesota Twins |
MLB | 80 |
| 1993 | Minnesota Twins |
MLB | 94 |
| 1992 | Minnesota Twins |
MLB | 141 |
| 1991 | Minnesota Twins |
MLB | 99 |
| 1990 | Minnesota Twins |
MLB | 110 |