Arnie Portocarrero
| Date | Team | Opponent | Result | IP | H | R | ER | BB | SO | PA | 2B | 3B | HR | GO | FO | MISC |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1958-04-20 | BAL | @ NYY | L, 7-0 | 2.0 | 1 | 2 | 2 | 4 | 1 | 11 | 1 | 0 | 0 | 2 | 3 | RP |
| 1958-05-01 | BAL | vs. CHW | L, 4-3 | 3.1 | 1 | 0 | 0 | 1 | 1 | 11 | 0 | 0 | 0 | 3 | 5 | RP |
| 1958-05-11 | BAL | vs. BOS | W, 4-0 | 6.0 | 2 | 0 | 0 | 1 | 2 | 22 | 1 | 0 | 0 | 5 | 11 | SP, W |
| 1958-05-17 | BAL | @ BOS | W, 5-3 | 7.0 | 4 | 2 | 2 | 3 | 2 | 26 | 0 | 0 | 1 | 5 | 12 | SP, W |
| 1958-05-22 | BAL | @ CHW | L, 5-1 | 4.0 | 4 | 3 | 2 | 3 | 1 | 20 | 2 | 1 | 0 | 2 | 9 | SP, L |
| 1958-05-26 | BAL | @ KCA | L, 5-4 | 4.0 | 3 | 1 | 1 | 3 | 2 | 17 | 2 | 0 | 1 | 5 | 4 | RP, L |
| 1958-05-30 | BAL | vs. BOS | W, 2-0 | 9.0 | 4 | 0 | 0 | 3 | 5 | 31 | 1 | 0 | 0 | 9 | 10 | SP, W, CG, SHO |
| 1958-06-03 | BAL | vs. DET | W, 2-0 | 9.0 | 6 | 0 | 0 | 0 | 4 | 31 | 0 | 0 | 0 | 5 | 16 | SP, W, CG, SHO |
| 1958-06-08 | BAL | vs. KCA | L, 2-1 | 8.0 | 5 | 2 | 2 | 2 | 1 | 31 | 3 | 0 | 0 | 6 | 16 | SP, L |
| 1958-06-12 | BAL | vs. CLE | W, 7-5 | 3.1 | 7 | 4 | 4 | 1 | 1 | 16 | 1 | 1 | 1 | 2 | 5 | SP |
| 1958-06-15 | BAL | vs. CHW | L, 4-0 | 6.0 | 8 | 4 | 4 | 1 | 3 | 26 | 1 | 0 | 0 | 3 | 11 | SP, L |
| 1958-06-18 | BAL | @ KCA | W, 5-3 | 2.0 | 3 | 1 | 1 | 0 | 0 | 9 | 1 | 0 | 0 | 3 | 3 | RP, SV |
| 1958-06-23 | BAL | @ DET | L, 3-1 | 7.0 | 7 | 2 | 2 | 1 | 6 | 30 | 0 | 0 | 1 | 5 | 9 | SP, L |
| 1958-06-29 | BAL | @ CLE | W, 5-2 | 9.0 | 5 | 2 | 2 | 2 | 2 | 32 | 0 | 0 | 0 | 11 | 12 | SP, W, CG |
| 1958-07-04 | BAL | @ BOS | W, 5-3 | 9.0 | 9 | 3 | 3 | 2 | 4 | 35 | 2 | 0 | 0 | 10 | 10 | SP, W, CG |
| 1958-07-10 | BAL | vs. KCA | W, 3-2 | 9.0 | 5 | 2 | 2 | 1 | 3 | 33 | 1 | 0 | 2 | 10 | 13 | SP, W, CG |
| 1958-07-15 | BAL | vs. CHW | W, 4-3 | 12.0 | 7 | 3 | 3 | 2 | 5 | 44 | 1 | 0 | 0 | 8 | 22 | SP, W, CG |
| 1958-07-20 | BAL | vs. CLE | W, 3-2 | 10.0 | 2 | 2 | 2 | 3 | 4 | 36 | 0 | 0 | 0 | 10 | 14 | SP, W, CG |
| 1958-07-23 | BAL | @ CHW | W, 6-4 | 1.0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 1 | 2 | RP, SV |
| 1958-07-25 | BAL | @ KCA | W, 8-3 | 9.0 | 8 | 3 | 3 | 1 | 4 | 36 | 0 | 0 | 3 | 8 | 15 | SP, W, CG |
| 1958-07-30 | BAL | @ CLE | L, 6-3 | 8.0 | 7 | 6 | 4 | 1 | 3 | 32 | 1 | 2 | 0 | 9 | 10 | SP, L, CG |
| 1958-08-04 | BAL | vs. NYY | L, 9-4 | 6.2 | 9 | 7 | 7 | 1 | 3 | 31 | 1 | 0 | 1 | 4 | 11 | SP, L |
| 1958-08-09 | BAL | @ WSH | W, 12-5 | 6.1 | 9 | 3 | 3 | 6 | 3 | 35 | 0 | 0 | 0 | 7 | 9 | SP, W |
| 1958-08-13 | BAL | vs. BOS | W, 2-1 | 5.0 | 3 | 1 | 1 | 3 | 2 | 21 | 1 | 0 | 0 | 3 | 10 | SP, W |
| 1958-08-19 | BAL | vs. KCA | L, 6-4 | 6.0 | 10 | 5 | 4 | 1 | 2 | 27 | 1 | 1 | 1 | 3 | 11 | SP, L |
| 1958-08-23 | BAL | vs. DET | L, 5-1 | 5.0 | 8 | 4 | 1 | 1 | 0 | 24 | 1 | 0 | 0 | 6 | 8 | SP, L |
| 1958-08-29 | BAL | @ BOS | L, 5-2 | 4.0 | 6 | 5 | 5 | 0 | 3 | 18 | 2 | 1 | 1 | 3 | 6 | SP, L |
| 1958-09-03 | BAL | @ WSH | W, 4-3 | 8.0 | 6 | 2 | 2 | 1 | 7 | 30 | 1 | 0 | 1 | 3 | 12 | SP, W |
| 1958-09-09 | BAL | @ KCA | L, 8-6 | 3.1 | 6 | 6 | 6 | 4 | 3 | 22 | 0 | 0 | 3 | 2 | 4 | SP, L |
| 1958-09-14 | BAL | @ CLE | W, 4-2 | 8.2 | 5 | 2 | 2 | 3 | 6 | 33 | 1 | 0 | 1 | 4 | 13 | SP, W |
| 1958-09-19 | BAL | vs. NYY | W, 5-4 | 5.0 | 9 | 4 | 4 | 0 | 2 | 23 | 2 | 1 | 0 | 4 | 7 | SP |
| 1958-09-24 | BAL | vs. WSH | W, 2-0 | 9.0 | 3 | 0 | 0 | 2 | 7 | 30 | 1 | 0 | 0 | 7 | 10 | SP, W, CG, SHO |
| Total Games: 32 | ||||||||||||||||