Mike Maroth career ERA
5.05Career Regular Season
Mike Maroth has a career ERA of 5.05 over 6 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. | ||
|---|---|---|---|---|---|---|---|---|---|---|
| 2002 |  DET | 21 | 6 | 10 | 4.48 | 128.2 | 58 | 36 | 1.34 | 0 |
| 2003 | DET | 33 | 9 | 21 | 5.73 | 193.1 | 87 | 50 | 1.45 | 0 |
| 2004 | DET | 33 | 11 | 13 | 4.31 | 217.0 | 108 | 59 | 1.40 | 0 |
| 2005 | DET | 34 | 14 | 14 | 4.74 | 209.0 | 115 | 51 | 1.37 | 0 |
| 2006 | DET | 13 | 5 | 2 | 4.19 | 53.2 | 24 | 16 | 1.49 | 0 |
| 2007 |  DET/STL | 27 | 5 | 7 | 6.89 | 116.1 | 51 | 50 | 1.87 | 0 |
What the columns mean: W · L · ERA · IP · K · BB · WHIP · SV
- Best season on file: 4.19 in 2006.
- Most recent: 6.89 in 2007.
Average of 6 regular seasons, 2002 through 2007. Figures come from ESPN's box scores and were last read on November 2, 2026.