Jack Armstrong had a 4-7 record with an ERA of 5.79 and 45 strikeouts in 14 appearances in his rookie season in 1988.
| 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. Armstrong | 1988 |  CIN | 14 | 4 | 7 | .364 | 13 | 5.79 | 45 | 0 | 0 | 0 | 65.1 | 63 | 42 | 44 | 8 | 38 | 0 | 0 | 2 | 293 | 3 | 6.20 | 5.23 | 1.18 | 1.10 | 15.4 | 13.0 | 1.55 | .272 | 6.06 | 163 | 4.72 | 129 | 8.68 | -7.4 |
Games
| NAME | DATE | SEASON | TM | OPP | DEC | GS | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | | J. Armstrong | 9/27/1988 | 1988 | CIN | @ |  SFG | L | 1 | 10.38 | 3 | 0 | 0 | 0 | 4.1 | 7 | 5 | 5 | 1 | 4 | 0 | 0 | 1 | 24 | 0 |
| 2 | | J. Armstrong | 9/22/1988 | 1988 | CIN | vs | SFG | W | 1 | 1.50 | 4 | 0 | 0 | 0 | 6.0 | 2 | 1 | 1 | 1 | 5 | 0 | 0 | 0 | 25 | 0 |
| 3 | | J. Armstrong | 9/17/1988 | 1988 | CIN | vs |  LAD | 0 | 0.00 | 3 | 0 | 0 | 0 | 4.2 | 2 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 18 | 0 | |
| 4 | | J. Armstrong | 9/3/1988 | 1988 | CIN | @ |  CHC | W | 1 | 4.50 | 2 | 0 | 0 | 0 | 6.0 | 6 | 3 | 4 | 0 | 4 | 0 | 0 | 0 | 26 | 0 |
| 5 | | J. Armstrong | 8/17/1988 | 1988 | CIN | vs | CHC | L | 1 | 21.60 | 0 | 0 | 0 | 0 | 1.2 | 4 | 4 | 4 | 0 | 2 | 0 | 0 | 0 | 10 | 0 |
| 6 | | J. Armstrong | 8/12/1988 | 1988 | CIN | vs |  ATL | L | 1 | 13.50 | 1 | 0 | 0 | 0 | 4.0 | 10 | 6 | 6 | 1 | 1 | 0 | 0 | 0 | 22 | 0 |
| 7 | | J. Armstrong | 7/29/1988 | 1988 | CIN | @ |  SDP | L | 1 | 4.50 | 1 | 0 | 0 | 0 | 4.0 | 5 | 2 | 3 | 1 | 4 | 0 | 0 | 0 | 21 | 1 |
| 8 | | J. Armstrong | 7/24/1988 | 1988 | CIN | vs |  MON | 1 | 3.00 | 8 | 0 | 0 | 0 | 6.0 | 2 | 2 | 2 | 1 | 1 | 0 | 0 | 0 | 21 | 0 | |
| 9 | | J. Armstrong | 7/17/1988 | 1988 | CIN | @ | MON | W | 1 | 1.29 | 5 | 0 | 0 | 0 | 7.0 | 2 | 1 | 1 | 0 | 3 | 0 | 0 | 0 | 26 | 1 |
| 10 | | J. Armstrong | 7/10/1988 | 1988 | CIN | vs |  PHI | W | 1 | 5.06 | 7 | 0 | 0 | 0 | 5.1 | 4 | 3 | 3 | 1 | 2 | 0 | 0 | 0 | 21 | 0 |
| 11 | | J. Armstrong | 7/6/1988 | 1988 | CIN | @ |  NYM | 1 | 5.40 | 2 | 0 | 0 | 0 | 5.0 | 3 | 3 | 3 | 1 | 3 | 0 | 0 | 0 | 21 | 0 | |
| 12 | | J. Armstrong | 7/2/1988 | 1988 | CIN | @ | PHI | L | 1 | 7.36 | 2 | 0 | 0 | 0 | 3.2 | 7 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 19 | 0 |
| 13 | | J. Armstrong | 6/27/1988 | 1988 | CIN | vs | SDP | L | 1 | 47.25 | 2 | 0 | 0 | 0 | 1.1 | 7 | 7 | 7 | 1 | 3 | 0 | 0 | 0 | 14 | 1 |
| 14 | | J. Armstrong | 6/21/1988 | 1988 | CIN | @ |  HOU | L | 1 | 2.84 | 5 | 0 | 0 | 0 | 6.1 | 2 | 2 | 2 | 0 | 5 | 0 | 0 | 1 | 25 | 0 |
| Total | 13 | 5.79 | 45 | 0 | 0 | 0 | 65.1 | 63 | 42 | 44 | 8 | 38 | 0 | 0 | 2 | 293 | 3 |
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