| 1998 National League Pitching Leaders |
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| Earned Run Average (min 162 IP) | Won-Lost Percentage (min 13 decisions) | Opposition Average (min 600 batters faced) | |||
| MADDUX, GREG (ATL) | 2.20 | NEAGLE, DENNY (HOU) | .826 (19-4) | BENES, ALAN (SDP) | .190 |
| NEAGLE, DENNY (HOU) | 2.52 | BENES, ALAN (SDP) | .824 (14-3) | MARTINEZ, PEDRO (FLA) | .207 |
| BROWN, KEVIN (ATL) | 2.53 | SULLIVAN, SCOTT (CUB) | .786 (11-3) | MADDUX, GREG (ATL) | .212 |
| TOMKO, BRETT (SFG) | 2.79 | STOTTLEMYRE, TODD (CIN) | .762 (16-5) | SCHILLING, CURT (CUB) | .216 |
| BEECH, MATT (STL) | 2.83 | BENES, ANDY (FLA) | .727 (16-6) | PARK, CHAN HO (PIT) | .218 |
| SMOLTZ, JOHN (SDP) | 2.98 | REED, RICK (PIT) | .714 (15-6) | BEECH, MATT (STL) | .218 |
| GLAVINE, TOM (SFG) | 3.13 | BEECH, MATT (STL) | .700 (14-6) | CORDOVA, FRANCISCO (MIL) | .222 |
| BENES, ALAN (SDP) | 3.20 | REMLINGER, MIKE (CIN) | .700 (14-6) | SMOLTZ, JOHN (SDP) | .222 |
| VALDES, ISMAEL (FLA) | 3.25 | RINCON, RICARDO (CIN) | .692 (9-4) | ESTES, SHAWN (SDP) | .224 |
| PEREZ, CARLOS (HOU) | 3.27 | VALDES, ISMAEL (FLA) | .680 (17-8) | FOSTER, KEVIN (CUB) | .226 |
| Wins | Losses | Saves | |||
| KILE, DARRYL (HOU) | 19 | ASHBY, ANDY (NYM) | 19 | WAGNER, BILLY (NYM) | 35 |
| NEAGLE, DENNY (HOU) | 19 | SCHILLING, CURT (CUB) | 16 | WOHLERS, MARK (ATL) | 31 |
| MADDUX, GREG (ATL) | 18 | 9 TIED WITH | 15 | NEN, ROBB (MIL) | 31 |
| 4 TIED WITH | FRANCO, JOHN (SDP) | 30 | |||
| BECK, ROD (HOU) | 30 | ||||
| Strikeouts | Walks | Home Runs Allowed | |||
| MARTINEZ, PEDRO (FLA) | 341 | NOMO, HIDEO (NYM) | 113 | JONES, BOBBY (PIT) | 48 |
| SCHILLING, CURT (CUB) | 320 | ESTES, SHAWN (SDP) | 113 | TRACHSEL, STEVE (PIT) | 38 |
| SMOLTZ, JOHN (SDP) | 263 | LEITER, AL (CUB) | 109 | PARK, CHAN HO (PIT) | 37 |
| BENES, ANDY (FLA) | 243 | KILE, DARRYL (HOU) | 103 | GONZALEZ, JEREMI (SFG) | 37 |
| 3 TIED WITH | 235 | ALVAREZ, WILSON (NYM) | 100 | 2 TIED WITH | 35 |