Jack Armstrong career ERA
4.58Career Regular Season
Jack Armstrong has a career ERA of 4.58 over 7 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. | ||
|---|---|---|---|---|---|---|---|---|---|---|
| 1988 |  CIN | 14 | 4 | 7 | 5.79 | 65.1 | 45 | 38 | 1.55 | 0 |
| 1989 | CIN | 9 | 2 | 3 | 4.64 | 42.2 | 23 | 21 | 1.43 | 0 |
| 1990 | CIN | 29 | 12 | 9 | 3.42 | 166.0 | 110 | 59 | 1.27 | 0 |
| 1991 | CIN | 27 | 7 | 13 | 5.48 | 139.2 | 93 | 54 | 1.52 | 0 |
| 1992 |  CLE | 35 | 6 | 15 | 4.64 | 166.2 | 114 | 67 | 1.46 | 0 |
| 1993 |  MIA | 36 | 9 | 17 | 4.49 | 196.1 | 118 | 78 | 1.47 | 0 |
| 1994 |  TEX | 2 | 0 | 1 | 3.60 | 10.0 | 7 | 2 | 1.10 | 0 |
What the columns mean: W · L · ERA · IP · K · BB · WHIP · SV
- Best season on file: 3.42 in 1990.
- Most recent: 3.60 in 1994.
Average of 7 regular seasons, 1988 through 1994. Figures come from ESPN's box scores and were last read on November 14, 2026.