Mike Birkbeck ERA in 1989
5.441989 Regular Season
Mike Birkbeck posted a 5.44 ERA in the 1989 regular season.
- 4th-best of Mike Birkbeck's 6 seasons on file; the best is 1.63 in 1995.
- Up 0.72 from 4.72 in 1988.
Average of 6 regular seasons, 1986 through 1995. 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. | ||
|---|---|---|---|---|---|---|---|---|---|---|
| 1986 |  MIL | 7 | 1 | 1 | 4.50 | 22.0 | 13 | 12 | 1.64 | 0 |
| 1987 | MIL | 10 | 1 | 4 | 6.20 | 45.0 | 25 | 19 | 1.82 | 0 |
| 1988 | MIL | 23 | 10 | 8 | 4.72 | 124.0 | 64 | 37 | 1.44 | 0 |
| 1989 | MIL | 9 | 0 | 4 | 5.44 | 44.2 | 31 | 22 | 1.77 | 0 |
| 1992 |  NYM | 1 | 0 | 1 | 9.00 | 7.0 | 2 | 1 | 1.86 | 0 |
| 1995 | NYM | 4 | 0 | 1 | 1.63 | 27.2 | 14 | 2 | 0.87 | 0 |
What the columns mean: W · L · ERA · IP · K · BB · WHIP · SV