Jim Acker career ERA
3.97Career Regular Season
Jim Acker has a career ERA of 3.97 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. | ||
|---|---|---|---|---|---|---|---|---|---|---|
| 1983 |  TOR | 38 | 5 | 1 | 4.33 | 97.2 | 44 | 38 | 1.44 | 1 |
| 1984 | TOR | 32 | 3 | 5 | 4.38 | 72.0 | 33 | 25 | 1.44 | 1 |
| 1985 | TOR | 61 | 7 | 2 | 3.23 | 86.1 | 42 | 43 | 1.49 | 10 |
| 1986 |  TOR/ATL | 44 | 5 | 12 | 4.01 | 155.0 | 69 | 48 | 1.36 | 0 |
| 1987 | ATL | 68 | 4 | 9 | 4.16 | 114.2 | 68 | 51 | 1.40 | 14 |
| 1988 | ATL | 21 | 0 | 4 | 4.71 | 42.0 | 25 | 14 | 1.40 | 0 |
| 1989 | ATL/TOR | 73 | 2 | 7 | 2.43 | 126.0 | 92 | 32 | 1.11 | 2 |
| 1990 | TOR | 59 | 4 | 4 | 3.83 | 91.2 | 54 | 30 | 1.45 | 1 |
| 1991 | TOR | 54 | 3 | 5 | 5.20 | 88.1 | 44 | 36 | 1.28 | 1 |
| 1992 |  SEA | 17 | 0 | 0 | 5.28 | 30.2 | 11 | 12 | 1.86 | 0 |
What the columns mean: W · L · ERA · IP · K · BB · WHIP · SV
- Best season on file: 2.43 in 1989.
- Most recent: 5.28 in 1992.
Average of 10 regular seasons, 1983 through 1992. Figures come from ESPN's box scores and were last read on November 2, 2026.