John Thomson career ERA
4.68Career Regular Season
John Thomson has a career ERA of 4.68 over 10 regular seasons.
| GP: Games the player appeared in, however briefly. | W: Games in which this pitcher was credited with the win. | L: Games in which this pitcher was charged with the loss. | ERA: Earned runs allowed per nine innings pitched — lower is better. Under 3.00 is excellent. | IP: Innings pitched. The decimal counts outs, so 6.2 is six innings and two more outs. | K: Batters this pitcher struck out. | BB: Times the batter reached first base on four balls. | WHIP: Walks and hits allowed per inning pitched — lower is better. Around 1.00 is elite. | SV: Games finished by protecting a narrow lead to the last out. | ||
|---|---|---|---|---|---|---|---|---|---|---|
| 1997 |  COL | 27 | 7 | 9 | 4.71 | 166.1 | 106 | 51 | 1.47 | 0 |
| 1998 | COL | 26 | 8 | 11 | 4.81 | 161.0 | 106 | 49 | 1.39 | 0 |
| 1999 | COL | 14 | 1 | 10 | 8.04 | 62.2 | 34 | 36 | 1.93 | 0 |
| 2001 | COL | 14 | 4 | 5 | 4.04 | 93.2 | 68 | 25 | 1.16 | 0 |
| 2002 |  COL/NYM | 30 | 9 | 14 | 4.71 | 181.2 | 107 | 44 | 1.35 | 0 |
| 2003 |  TEX | 35 | 13 | 14 | 4.85 | 217.0 | 136 | 49 | 1.30 | 0 |
| 2004 |  ATL | 33 | 14 | 8 | 3.72 | 198.1 | 133 | 52 | 1.32 | 0 |
| 2005 | ATL | 17 | 4 | 6 | 4.47 | 98.2 | 61 | 28 | 1.41 | 0 |
| 2006 | ATL | 18 | 2 | 7 | 4.82 | 80.1 | 46 | 32 | 1.56 | 0 |
| 2007 |  KC | 2 | 1 | 1 | 3.38 | 10.2 | 3 | 3 | 1.50 | 0 |
What the columns mean: W · L · ERA · IP · K · BB · WHIP · SV
- Best season on file: 3.38 in 2007.
Average of 10 regular seasons, 1997 through 2007. Figures come from ESPN's box scores and were last read on November 5, 2026.