John Thomson ERA in 2003
4.852003 Regular Season
John Thomson posted a 4.85 ERA in the 2003 regular season.
- 9th-best of John Thomson's 10 seasons on file; the best is 3.38 in 2007.
- Up 0.14 from 4.71 in 2002.
Figures come from ESPN's box scores and were last read on October 26, 2026.