Al Mattern career ERA
3.37Career Regular Season
Al Mattern has a career ERA of 3.37 over 5 regular seasons.
- Best season on file: 2.08 in 1908.
- Most recent: 7.11 in 1912.
Figures come from ESPN's box scores and were last read on September 22, 2026.
| 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. | ||
|---|---|---|---|---|---|---|---|---|---|---|
| 1908 |  ATL | 5 | 1 | 2 | 2.08 | 30.1 | 8 | 6 | 1.19 | 0 |
| 1909 | ATL | 47 | 15 | 21 | 2.85 | 316.1 | 98 | 108 | 1.36 | 3 |
| 1910 | ATL | 51 | 16 | 19 | 2.98 | 305.0 | 94 | 121 | 1.34 | 1 |
| 1911 | ATL | 33 | 4 | 15 | 4.97 | 186.1 | 51 | 63 | 1.56 | 0 |
| 1912 | ATL | 2 | 0 | 1 | 7.11 | 6.1 | 3 | 1 | 1.74 | 0 |
What the columns mean: W · L · ERA · IP · K · BB · WHIP · SV