John Patterson career ERA
4.32Career Regular Season
John Patterson has a career ERA of 4.32 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 |  ARI | 7 | 2 | 0 | 3.23 | 30.2 | 31 | 7 | 1.11 | 0 |
| 2003 | ARI | 16 | 1 | 4 | 6.05 | 55.0 | 43 | 30 | 1.65 | 1 |
| 2004 |  WSH | 19 | 4 | 7 | 5.03 | 98.1 | 99 | 46 | 1.48 | 0 |
| 2005 | WSH | 31 | 9 | 7 | 3.13 | 198.1 | 185 | 65 | 1.19 | 0 |
| 2006 | WSH | 8 | 1 | 2 | 4.43 | 40.2 | 42 | 9 | 1.11 | 0 |
| 2007 | WSH | 7 | 1 | 5 | 7.47 | 31.1 | 15 | 22 | 1.95 | 0 |
What the columns mean: W · L · ERA · IP · K · BB · WHIP · SV
- Best season on file: 3.13 in 2005.
- Most recent: 7.47 in 2007.
Figures come from ESPN's box scores and were last read on October 25, 2026.