Jack Harper career ERA
3.55Career Regular Season
Jack Harper has a career ERA of 3.55 over 8 regular seasons.
- Best season on file: 2.30 in 1904.
- Most recent: 4.06 in 1906.
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. | ||
|---|---|---|---|---|---|---|---|---|---|---|
| 1899 | — | 5 | 1 | 4 | 3.89 | 37.0 | 14 | 12 | 1.51 | 0 |
| 1900 |  STL | 1 | 0 | 1 | 12.00 | 3.0 | 0 | 2 | 2.00 | 0 |
| 1901 | STL | 39 | 23 | 13 | 3.62 | 308.2 | 128 | 99 | 1.27 | 0 |
| 1902 |  BAL | 29 | 15 | 11 | 4.13 | 222.1 | 74 | 81 | 1.37 | 0 |
| 1903 |  CIN | 17 | 8 | 9 | 4.33 | 135.0 | 45 | 70 | 1.58 | 0 |
| 1904 | CIN | 35 | 23 | 9 | 2.30 | 293.2 | 125 | 85 | 1.18 | 0 |
| 1905 | CIN | 26 | 9 | 13 | 3.86 | 179.1 | 70 | 69 | 1.44 | 1 |
| 1906 |  CIN/CHC | 6 | 1 | 4 | 4.06 | 37.2 | 10 | 20 | 1.54 | 0 |
What the columns mean: W · L · ERA · IP · K · BB · WHIP · SV