John Costello
| Date | Team | Opponent | Result | IP | H | R | ER | BB | SO | PA | 2B | 3B | HR | GO | FO | MISC |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1990-04-15 | STL | @ PHI | L, 4-0 | 1.0 | 1 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 2 | RP |
| 1990-04-19 | STL | vs. PIT | L, 5-1 | 1.0 | 1 | 1 | 1 | 0 | 1 | 4 | 0 | 0 | 1 | 0 | 2 | RP |
| 1990-04-21 | STL | vs. PHI | L, 7-6 | 1.0 | 1 | 0 | 0 | 0 | 0 | 4 | 1 | 0 | 0 | 2 | 1 | RP |
| 1990-04-22 | STL | vs. PHI | L, 5-3 | 1.1 | 4 | 2 | 2 | 1 | 0 | 9 | 2 | 0 | 0 | 2 | 2 | RP |
| 1990-04-24 | MON | @ HOU | W, 5-3 | 0.1 | 1 | 0 | 0 | 0 | 0 | 2 | 1 | 0 | 0 | 0 | 1 | RP |
| 1990-05-26 | MON | vs. CIN | L, 5-3 | 1.0 | 2 | 2 | 2 | 0 | 0 | 5 | 1 | 0 | 1 | 1 | 2 | RP |
| 1990-06-12 | MON | @ PHI | L, 7-2 | 2.0 | 2 | 2 | 2 | 1 | 1 | 9 | 0 | 0 | 1 | 1 | 3 | RP |
| 1990-06-17 | MON | @ STL | L, 7-1 | 3.0 | 0 | 1 | 0 | 0 | 0 | 10 | 0 | 0 | 0 | 1 | 8 | RP |
| Total Games: 8 | ||||||||||||||||