Mark Portugal
| Date | Team | Opponent | Result | IP | H | R | ER | BB | SO | PA | 2B | 3B | HR | GO | FO | MISC |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1991-04-12 | HOU | vs. SFG | W, 3-2 | 7.0 | 7 | 2 | 2 | 0 | 6 | 29 | 1 | 0 | 0 | 6 | 8 | SP, W |
| 1991-04-17 | HOU | @ ATL | W, 4-3 | 7.0 | 6 | 3 | 3 | 0 | 6 | 27 | 1 | 0 | 2 | 7 | 8 | SP, W |
| 1991-04-30 | HOU | @ CHC | L, 10-3 | 3.0 | 6 | 6 | 6 | 3 | 1 | 16 | 2 | 0 | 1 | 2 | 3 | SP, L |
| 1991-05-05 | HOU | @ PIT | W, 6-4 | 7.1 | 4 | 4 | 4 | 3 | 4 | 28 | 1 | 0 | 1 | 9 | 8 | SP, W |
| 1991-05-11 | HOU | vs. STL | W, 6-1 | 7.0 | 3 | 1 | 1 | 2 | 6 | 24 | 0 | 0 | 1 | 4 | 8 | SP, W |
| 1991-05-16 | HOU | vs. PIT | L, 6-4 | 4.1 | 8 | 4 | 4 | 3 | 4 | 23 | 2 | 0 | 0 | 4 | 4 | SP |
| 1991-05-21 | HOU | vs. LAD | L, 7-3 | 5.0 | 3 | 0 | 0 | 1 | 5 | 19 | 0 | 0 | 0 | 5 | 5 | SP |
| 1991-05-26 | HOU | vs. SDP | W, 13-3 | 7.0 | 7 | 2 | 2 | 0 | 6 | 27 | 1 | 1 | 0 | 6 | 7 | SP, W |
| 1991-05-31 | HOU | @ SDP | L, 5-4 | 7.0 | 9 | 5 | 5 | 4 | 6 | 33 | 4 | 0 | 1 | 11 | 2 | SP, L |
| 1991-06-06 | HOU | vs. MON | W, 9-8 | 5.0 | 6 | 4 | 4 | 3 | 3 | 24 | 1 | 0 | 0 | 5 | 6 | SP |
| 1991-06-11 | HOU | vs. PHI | W, 1-0 | 10.0 | 6 | 0 | 0 | 1 | 7 | 35 | 0 | 0 | 0 | 11 | 7 | SP |
| 1991-06-16 | HOU | @ NYM | W, 5-4 | 6.0 | 7 | 3 | 3 | 2 | 4 | 25 | 0 | 1 | 0 | 5 | 7 | SP, W |
| 1991-06-21 | HOU | @ PHI | L, 3-0 | 7.0 | 4 | 3 | 3 | 0 | 7 | 25 | 0 | 0 | 1 | 5 | 9 | SP, L |
| 1991-06-27 | HOU | vs. ATL | L, 3-0 | 8.0 | 6 | 3 | 3 | 2 | 6 | 31 | 1 | 0 | 0 | 5 | 10 | SP, L |
| 1991-07-02 | HOU | @ SFG | W, 8-4 | 7.0 | 5 | 2 | 2 | 2 | 6 | 27 | 0 | 0 | 1 | 8 | 6 | SP, W |
| 1991-07-07 | HOU | vs. CIN | W, 7-3 | 6.1 | 6 | 3 | 2 | 3 | 3 | 27 | 1 | 0 | 1 | 7 | 8 | SP, W |
| 1991-07-12 | HOU | @ CHC | L, 5-2 | 5.0 | 8 | 5 | 4 | 4 | 3 | 27 | 2 | 0 | 0 | 7 | 3 | SP, L |
| 1991-07-17 | HOU | @ PIT | W, 10-2 | 0.2 | 2 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 2 | 0 | SP |
| 1991-08-13 | HOU | @ SDP | W, 12-9 | 4.0 | 5 | 9 | 7 | 3 | 2 | 21 | 0 | 1 | 3 | 6 | 2 | SP |
| 1991-08-18 | HOU | @ LAD | W, 8-4 | 5.0 | 6 | 4 | 4 | 4 | 5 | 24 | 1 | 0 | 0 | 4 | 3 | SP, W |
| 1991-08-24 | HOU | vs. MON | L, 5-1 | 7.0 | 5 | 2 | 2 | 2 | 8 | 27 | 2 | 0 | 0 | 3 | 9 | SP, L |
| 1991-08-29 | HOU | @ PHI | W, 5-1 | 9.0 | 6 | 1 | 1 | 0 | 6 | 34 | 1 | 0 | 1 | 7 | 14 | SP, W, CG |
| 1991-09-03 | HOU | @ NYM | L, 6-1 | 6.0 | 8 | 6 | 5 | 4 | 5 | 30 | 4 | 0 | 0 | 3 | 9 | SP, L |
| 1991-09-09 | HOU | vs. SDP | L, 3-0 | 8.0 | 4 | 1 | 0 | 0 | 3 | 29 | 1 | 0 | 0 | 11 | 10 | SP, L |
| 1991-09-14 | HOU | @ CIN | W, 7-3 | 6.0 | 3 | 3 | 3 | 1 | 4 | 23 | 0 | 0 | 3 | 8 | 6 | SP |
| 1991-09-19 | HOU | @ LAD | L, 4-3 | 7.0 | 6 | 4 | 4 | 3 | 3 | 27 | 1 | 0 | 2 | 7 | 7 | SP, L |
| 1991-09-22 | HOU | vs. CIN | W, 4-1 | 1.0 | 0 | 0 | 0 | 2 | 0 | 5 | 0 | 0 | 0 | 2 | 1 | RP, SV |
| 1991-09-24 | HOU | vs. SFG | L, 9-7 | 0.1 | 3 | 4 | 4 | 3 | 0 | 7 | 0 | 0 | 0 | 0 | 1 | RP, L |
| 1991-09-27 | HOU | vs. ATL | L, 4-2 | 0.2 | 3 | 1 | 1 | 1 | 0 | 5 | 0 | 0 | 0 | 0 | 1 | RP |
| 1991-09-28 | HOU | vs. ATL | L, 5-4 | 1.2 | 2 | 1 | 1 | 0 | 0 | 6 | 0 | 0 | 1 | 4 | 0 | RP |
| 1991-09-29 | HOU | vs. ATL | L, 6-5 | 1.0 | 2 | 1 | 1 | 1 | 1 | 5 | 1 | 0 | 0 | 1 | 0 | RP, L |
| 1991-10-05 | HOU | @ ATL | L, 5-2 | 2.0 | 7 | 4 | 3 | 2 | 0 | 16 | 1 | 0 | 0 | 2 | 2 | SP, L |
| Total Games: 32 | ||||||||||||||||