Between the 1990 and 1999 seasons, pitchers had their best ERA with 50.0+ innings pitched in a season in 1992, with an ERA of 3.52.
Interpreted as:
reliever era in a regular season record 50 or more innings pitched 1990 to 1999| POSITION | ERA | IP | SEASON | G | W | L | W% | GS | SO | CG | SHO | SV | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | K/9 | BB/9 | K/BB | HR/9 | K% | BB% | WHIP | BABIP | RA | H/9 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Pitcher | 3.52 | 11731.1 | 1992 | 9,039 | 646 | 590 | .523 | 0 | 8,078 | 0 | 0 | 1,109 | 10,935 | 4,585 | 5,048 | 880 | 4,836 | 336 | 3,793 | 801 | 50,092 | 510 | 6.20 | 3.71 | 1.67 | 0.68 | 16.1 | 9.7 | 1.34 | .280 | 3.87 | 8.39 |
| 2 | Pitcher | 3.62 | 12037.1 | 1990 | 8,478 | 596 | 569 | .512 | 0 | 8,307 | 0 | 0 | 1,113 | 11,459 | 4,835 | 5,434 | 991 | 4,899 | 301 | 3,776 | 826 | 51,568 | 527 | 6.21 | 3.66 | 1.70 | 0.74 | 16.1 | 9.5 | 1.36 | .282 | 4.06 | 8.57 |
| 3 | Pitcher | 3.69 | 12176.2 | 1991 | 8,954 | 609 | 574 | .515 | 0 | 8,589 | 0 | 0 | 1,132 | 11,374 | 4,994 | 5,549 | 1,043 | 4,966 | 304 | 3,833 | 785 | 51,948 | 568 | 6.35 | 3.67 | 1.73 | 0.77 | 16.5 | 9.6 | 1.34 | .279 | 4.10 | 8.41 |
| 4 | Pitcher | 4.04 | 12775.2 | 1993 | 10,299 | 649 | 628 | .508 | 0 | 9,375 | 0 | 0 | 1,192 | 12,606 | 5,733 | 6,409 | 1,192 | 5,399 | 410 | 4,165 | 852 | 55,474 | 609 | 6.60 | 3.80 | 1.74 | 0.84 | 16.9 | 9.7 | 1.41 | .292 | 4.51 | 8.88 |
| 5 | Pitcher | 4.19 | 13966.1 | 1998 | 11,960 | 690 | 668 | .508 | 0 | 11,073 | 0 | 0 | 1,265 | 13,607 | 6,501 | 7,090 | 1,484 | 5,969 | 541 | 4,560 | 651 | 60,719 | 676 | 7.14 | 3.85 | 1.86 | 0.96 | 18.2 | 9.8 | 1.40 | .291 | 4.57 | 8.77 |
| 6 | Pitcher | 4.26 | 13284.2 | 1997 | 11,323 | 683 | 679 | .501 | 0 | 10,766 | 0 | 0 | 1,139 | 13,414 | 6,282 | 6,910 | 1,442 | 5,799 | 512 | 4,262 | 709 | 58,216 | 642 | 7.29 | 3.93 | 1.86 | 0.98 | 18.5 | 10.0 | 1.45 | .302 | 4.68 | 9.09 |
| 7 | Pitcher | 4.30 | 12124.2 | 1995 | 9,881 | 615 | 587 | .512 | 0 | 9,457 | 0 | 0 | 1,006 | 12,024 | 5,795 | 6,317 | 1,335 | 5,445 | 462 | 3,759 | 682 | 53,104 | 621 | 7.02 | 4.04 | 1.74 | 0.99 | 17.8 | 10.3 | 1.44 | .294 | 4.69 | 8.93 |
| 8 | Pitcher | 4.37 | 13553.1 | 1996 | 11,059 | 706 | 650 | .521 | 0 | 10,915 | 0 | 0 | 1,116 | 13,487 | 6,579 | 7,249 | 1,556 | 6,239 | 507 | 4,243 | 847 | 59,613 | 672 | 7.25 | 4.14 | 1.75 | 1.03 | 18.3 | 10.5 | 1.46 | .295 | 4.81 | 8.96 |
| 9 | Pitcher | 4.43 | 9112.2 | 1994 | 7,442 | 469 | 463 | .503 | 0 | 6,858 | 0 | 0 | 777 | 9,328 | 4,481 | 4,958 | 996 | 4,051 | 344 | 2,944 | 612 | 40,207 | 456 | 6.77 | 4.00 | 1.69 | 0.98 | 17.1 | 10.1 | 1.47 | .298 | 4.90 | 9.21 |
| 10 | Pitcher | 4.48 | 14569.0 | 1999 | 12,417 | 730 | 693 | .513 | 0 | 11,594 | 0 | 0 | 1,217 | 14,628 | 7,250 | 7,934 | 1,762 | 6,795 | 590 | 4,616 | 691 | 64,224 | 721 | 7.16 | 4.20 | 1.71 | 1.09 | 18.1 | 10.6 | 1.47 | .296 | 4.90 | 9.04 |
StatMuse has game-level data for ERA and innings pitched going back to the 1901 season.
Some of the information used here was obtained free of charge from Retrosheet.
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| NL East | W | L | PCT | GB |
|---|---|---|---|---|
 Phillies - y | 96 | 66 | .593 | |
83 | 79 | .512 | 13.0 | |
79 | 83 | .488 | 17.0 | |
76 | 86 | .469 | 20.0 | |
66 | 96 | .407 | 30.0 | |
| NL Central | W | L | PCT | GB |
 Brewers - y | 97 | 65 | .599 | |
 Cubs - w | 92 | 70 | .568 | 5.0 |
 Reds - w | 83 | 79 | .512 | 14.0 |
78 | 84 | .481 | 19.0 | |
71 | 91 | .438 | 26.0 | |
| NL West | W | L | PCT | GB |
 Dodgers - y | 93 | 69 | .574 | |
 Padres - w | 90 | 72 | .556 | 3.0 |
81 | 81 | .500 | 12.0 | |
80 | 82 | .494 | 13.0 | |
43 | 119 | .265 | 50.0 |
Marlins
Braves
Nationals
Giants
Diamondbacks
Rockies| AL East | W | L | PCT | GB |
|---|---|---|---|---|
 Blue Jays - y | 94 | 68 | .580 | |
 Yankees - w | 94 | 68 | .580 | |
 Red Sox - w | 89 | 73 | .549 | 5.0 |
77 | 85 | .475 | 17.0 | |
75 | 87 | .463 | 19.0 | |
| AL Central | W | L | PCT | GB |
 Guardians - y | 88 | 74 | .543 | |
 Tigers - w | 87 | 75 | .537 | 1.0 |
82 | 80 | .506 | 6.0 | |
70 | 92 | .432 | 18.0 | |
60 | 102 | .370 | 28.0 | |
| AL West | W | L | PCT | GB |
 Mariners - y | 90 | 72 | .556 | |
87 | 75 | .537 | 3.0 | |
81 | 81 | .500 | 9.0 | |
76 | 86 | .469 | 14.0 | |
72 | 90 | .444 | 18.0 |
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Royals
Twins
White Sox
Astros
Rangers
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