John Thomson ERA in 2004
3.722004 Regular Season
John Thomson posted a 3.72 ERA in the 2004 regular season.
- 2nd-best of John Thomson's 10 seasons on file; the best is 3.38 in 2007.
- Down 1.13 from 4.85 in 2003.
Figures come from ESPN's box scores and were last read on November 11, 2026.