| West | W | L | Pct | GB |
| San Diego | 98 | 64 | .605 | -- |
| SF Giants | 89 | 74 | .546 | 9.5 |
| LA Dodgers | 83 | 79 | .512 | 15.0 |
| Colorado | 77 | 85 | .475 | 21.0 |
| Arizona | 65 | 97 | .401 | 33.0 |
| Pitcher | Game | Season | Result | Decision | IP | H | R | ER | HR | BB | SO | WP | BK | HB | TBF | Pitches | Str | Bal | Str% | Career G | Career W-L | Feat Description | |
| Felix Rodriguez | 1998-04-05 | 1998 | W 3-2 vs SFN | Sv | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 3 | 16 | 10 | 6 | 63% | 39 | 1-1 | 1st career save | |
| Ricky Pickett | 1998-04-28 | 1998 | L 12-2 vs ATL | 0.1 | 1 | 3 | 3 | 0 | 2 | 1 | 1 | 0 | 0 | 4 | 26 | 13 | 13 | 50% | 1 | 0-0 | 1st career game | ||
| Bryan Corey | 1998-05-13 | 1998 | L 8-3 vs MIL | 1 | 1 | 2 | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 5 | 16 | 7 | 9 | 44% | 1 | 0-0 | 1st career game | ||
| Jeff Suppan | 1998-05-15 | 1998 | W 6-1 vs PIT | W | CG | 9 | 3 | 1 | 0 | 0 | 1 | 2 | 0 | 0 | 0 | 30 | 92 | 65 | 27 | 71% | 47 | 10-10 | 3-hitter |
| Felix Rodriguez | 1998-05-16 | 1998 | L 6-3 vs PIT | 2 | 2 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 8 | 30 | 23 | 7 | 77% | 53 | 1-3 | Threw 77% strikes | ||
| Russ Springer | 1998-05-20 | 1998 | W 7-3 @ FLO | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 3 | 19 | 11 | 8 | 58% | 200 | 12-25 | 200th career game | ||
| Clint Sodowsky | 1998-06-06 | 1998 | L 10-5 @ OAK | 1.2 | 1 | 0 | 0 | 0 | 0 | 4 | 1 | 0 | 0 | 6 | 0 | 0 | 0 | -- | 80 | 6-9 | Struck out at least 2 batters per inning (1.2+ ip) | ||
| Omar Daal | 1998-07-30 | 1998 | W 4-0 vs CHN | W | SHO | 9 | 4 | 0 | 0 | 0 | 3 | 7 | 0 | 0 | 0 | 33 | 125 | 78 | 47 | 62% | 228 | 17-16 | Complete game/Shutout |
| Gregg Olson | 1998-08-03 | 1998 | W 6-5 @ CHN | Sv | 1.2 | 1 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 6 | 27 | 21 | 6 | 78% | 496 | 29-32 | Threw 78% strikes | |
| Ben Ford | 1998-08-20 | 1998 | W 12-9 @ PHI | 1.2 | 5 | 4 | 4 | 0 | 1 | 0 | 0 | 0 | 1 | 12 | 43 | 23 | 20 | 53% | 1 | 0-0 | 1st career game | ||
| Chris Michalak | 1998-08-22 | 1998 | L 9-4 @ NYN | 2 | 1 | 1 | 1 | 0 | 0 | 2 | 0 | 0 | 0 | 7 | 21 | 16 | 5 | 76% | 1 | 0-0 | 1st career game, Threw 76% strikes | ||
| Willie Banks | 1998-08-24 | 1998 | W 9-5 @ NYN | Sv | 1.2 | 3 | 4 | 3 | 0 | 0 | 2 | 0 | 0 | 0 | 8 | 25 | 17 | 8 | 68% | 136 | 31-37 | 1st career save | |
| Omar Daal | 1998-09-01 | 1998 | W 4-3 @ PIT | W | 8 | 6 | 3 | 1 | 1 | 0 | 12 | 0 | 0 | 0 | 30 | 99 | 70 | 29 | 71% | 234 | 19-20 | 12 Strikeouts | |
| Andy Benes | 1998-09-02 | 1998 | W 2-1 @ PIT | 7 | 3 | 1 | 1 | 0 | 0 | 10 | 0 | 0 | 0 | 24 | 98 | 68 | 30 | 69% | 291 | 115-107 | 10 Strikeouts | ||
| Brian Anderson | 1998-09-03 | 1998 | W 1-0 @ PIT | W | SHO | 9 | 3 | 0 | 0 | 0 | 0 | 4 | 0 | 1 | 0 | 30 | 101 | 71 | 30 | 70% | 86 | 31-28 | Complete game/Shutout, 3-hitter |
| Gregg Olson | 1998-09-07 | 1998 | W 4-2 vs LAN | Sv | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 4 | 12 | 8 | 4 | 67% | 511 | 29-32 | 200th career save | |
| Neil Weber | 1998-09-11 | 1998 | L 13-1 @ CIN | 1 | 1 | 0 | 0 | 0 | 1 | 2 | 0 | 0 | 0 | 5 | 17 | 9 | 8 | 53% | 1 | 0-0 | 1st career game | ||
| Vladimir Nunez | 1998-09-11 | 1998 | L 13-1 @ CIN | 1.1 | 1 | 2 | 2 | 0 | 1 | 1 | 0 | 0 | 0 | 6 | 23 | 13 | 10 | 57% | 1 | 0-0 | 1st career game | ||