Atlee Hammaker career ERA
3.66Career Regular Season
Atlee Hammaker has a career ERA of 3.66 over 12 regular seasons.
- Best season on file: 0.00 in 1994.
- Most recent: 12.79 in 1995.
Figures come from ESPN's box scores and were last read on September 21, 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. | ||
|---|---|---|---|---|---|---|---|---|---|---|
| 1981 |  KC | 10 | 1 | 3 | 5.54 | 39.0 | 11 | 12 | 1.44 | 0 |
| 1982 |  SF | 29 | 12 | 8 | 4.11 | 175.0 | 102 | 28 | 1.24 | 0 |
| 1983 | SF | 23 | 10 | 9 | 2.25 | 172.1 | 127 | 32 | 1.04 | 0 |
| 1984 | SF | 6 | 2 | 0 | 2.18 | 33.0 | 24 | 9 | 1.24 | 0 |
| 1985 | SF | 29 | 5 | 12 | 3.74 | 170.2 | 100 | 47 | 1.22 | 0 |
| 1987 | SF | 31 | 10 | 10 | 3.58 | 168.1 | 107 | 57 | 1.28 | 0 |
| 1988 | SF | 43 | 9 | 9 | 3.73 | 144.2 | 65 | 41 | 1.22 | 5 |
| 1989 | SF | 28 | 6 | 6 | 3.76 | 76.2 | 30 | 23 | 1.32 | 0 |
| 1990 |  SF/SD | 34 | 4 | 9 | 4.36 | 86.2 | 44 | 27 | 1.29 | 0 |
| 1991 | SD | 1 | 0 | 1 | 5.79 | 4.2 | 1 | 3 | 2.36 | 0 |
| 1994 |  CHW | 2 | 0 | 0 | 0.00 | 1.1 | 1 | 0 | 0.75 | 0 |
| 1995 | CHW | 13 | 0 | 0 | 12.79 | 6.1 | 3 | 8 | 3.00 | 0 |
What the columns mean: W · L · ERA · IP · K · BB · WHIP · SV