Jim Lonborg had a 2-3 record with an ERA of 3.51 and 14 strikeouts in 5 appearances in the postseason in his career.
| NAME | SEASON | TM | G | W | L | W% | GS | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | K/9 | BB/9 | K/BB | HR/9 | K% | BB% | WHIP | BABIP | RA | ERA- | FIP | FIP- | H/9 | PRAA | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | J. Lonborg | 1967 |  BOS | 3 | 2 | 1 | .667 | 3 | 2.63 | 11 | 2 | 1 | 0 | 24.0 | 14 | 7 | 8 | 3 | 2 | 0 | 0 | 0 | 89 | 1 | 4.13 | 0.75 | 5.50 | 1.13 | 12.4 | 2.2 | 0.67 | .151 | 3.00 | 5.25 | ||||
| 2 |  | J. Lonborg | 1976 |  PHI | 1 | 0 | 1 | .000 | 1 | 1.69 | 2 | 0 | 0 | 0 | 5.1 | 2 | 1 | 3 | 0 | 2 | 0 | 0 | 0 | 20 | 0 | 3.38 | 3.38 | 1.00 | 0.00 | 10.0 | 10.0 | 0.75 | .125 | 5.06 | 3.38 | ||||
| 3 | | J. Lonborg | 1977 | PHI | 1 | 0 | 1 | .000 | 1 | 11.25 | 1 | 0 | 0 | 0 | 4.0 | 5 | 5 | 5 | 1 | 1 | 0 | 0 | 1 | 18 | 0 | 2.25 | 2.25 | 1.00 | 2.25 | 5.6 | 5.6 | 1.50 | .267 | 11.25 | 11.25 | ||||
| Total | 5 | 2 | 3 | .400 | 5 | 3.51 | 14 | 2 | 1 | 0 | 33.1 | 21 | 13 | 16 | 4 | 5 | 0 | 0 | 1 | 127 | 1 | 3.78 | 1.35 | 2.80 | 1.08 | 11.0 | 3.9 | 0.78 | .163 | 4.32 | 5.67 |
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