Since 2000, Randy Johnson has the lowest ERA by a 40-year-old pitcher in a season, with an ERA of 2.60 in 2004.
Interpreted as:
lowest single season era with a minimum of 1 IP per team game by 40 year old pitcher since 2000| NAME | ERA | Age | SEASON | TM | G | W | L | W% | GS | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | K/9 | BB/9 | K/BB | HR/9 | K% | BB% | WHIP | BABIP | RA | ERA- | FIP | FIP- | H/9 | PRAA | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | R. Johnson | 2.60 | 40 | 2004 | 35 | 16 | 14 | .533 | 35 | 290 | 4 | 2 | 0 | 245.2 | 177 | 71 | 88 | 18 | 44 | 10 | 0 | 1 | 964 | 3 | 10.62 | 1.61 | 6.59 | 0.66 | 30.1 | 4.6 | 0.90 | .264 | 3.22 | 57 | 2.29 | 51 | 6.48 | 59.7 | |
| 2 |  | B. Colon | 2.65 | 40 | 2013 | 30 | 18 | 6 | .750 | 30 | 117 | 3 | 3 | 0 | 190.1 | 193 | 56 | 60 | 14 | 29 | 0 | 0 | 0 | 769 | 1 | 5.53 | 1.37 | 4.03 | 0.66 | 15.2 | 3.8 | 1.17 | .294 | 2.84 | 68 | 3.23 | 83 | 9.13 | 14 | |
| 3 |  | J. Smoltz | 3.11 | 40 | 2007 | 32 | 14 | 8 | .636 | 32 | 197 | 0 | 0 | 0 | 205.2 | 196 | 71 | 78 | 18 | 47 | 4 | 0 | 9 | 853 | 8 | 8.62 | 2.06 | 4.19 | 0.79 | 23.1 | 5.5 | 1.18 | .303 | 3.41 | 71 | 3.19 | 72 | 8.58 | 28.7 | |
| 4 |  | J. Verlander | 3.22 | 40 | 2023 | TOT | 27 | 13 | 8 | .619 | 27 | 144 | 0 | 0 | 0 | 162.1 | 139 | 58 | 63 | 18 | 45 | 5 | 0 | 0 | 669 | 5 | 7.98 | 2.49 | 3.20 | 1.00 | 21.5 | 6.7 | 1.13 | .265 | 3.49 | 76 | 3.84 | 90 | 7.71 | 8.1 |
| 5 |  | J. Moyer | 3.27 | 40 | 2003 | 33 | 21 | 7 | .750 | 33 | 129 | 1 | 0 | 0 | 215.0 | 199 | 78 | 83 | 19 | 66 | 8 | 0 | 3 | 897 | 0 | 5.40 | 2.76 | 1.95 | 0.80 | 14.4 | 7.4 | 1.23 | .267 | 3.47 | 76 | 4.01 | 92 | 8.33 | 8.7 | |
| 6 | | K. Rogers | 3.46 | 40 | 2005 | 30 | 14 | 8 | .636 | 30 | 87 | 1 | 1 | 0 | 195.1 | 205 | 75 | 86 | 15 | 53 | 8 | 0 | 1 | 828 | 0 | 4.01 | 2.44 | 1.64 | 0.69 | 10.5 | 6.4 | 1.32 | .286 | 3.96 | 76 | 4.05 | 92 | 9.45 | 7.6 | |
| 7 | | A. Wainwright | 3.71 | 40 | 2022 | 32 | 11 | 12 | .478 | 32 | 143 | 1 | 0 | 0 | 191.2 | 192 | 79 | 80 | 16 | 54 | 7 | 0 | 1 | 803 | 5 | 6.71 | 2.54 | 2.65 | 0.75 | 17.8 | 6.7 | 1.28 | .302 | 3.76 | 94 | 3.65 | 94 | 9.02 | 5.3 | |
| 8 | | T. Glavine | 3.82 | 40 | 2006 | 32 | 15 | 7 | .682 | 32 | 131 | 0 | 0 | 0 | 198.0 | 202 | 84 | 94 | 22 | 62 | 6 | 0 | 7 | 842 | 1 | 5.95 | 2.82 | 2.11 | 1.00 | 15.6 | 7.4 | 1.33 | .290 | 4.27 | 88 | 4.29 | 96 | 9.18 | 4.1 | |
| 9 | | R.A. Dickey | 3.91 | 40 | 2015 | 33 | 11 | 11 | .500 | 33 | 126 | 2 | 0 | 0 | 214.1 | 195 | 93 | 97 | 25 | 61 | 11 | 0 | 1 | 884 | 9 | 5.29 | 2.56 | 2.07 | 1.05 | 14.3 | 6.9 | 1.19 | .257 | 4.07 | 97 | 4.48 | 110 | 8.19 | -9.4 | |
| 10 |  | R. Clemens | 3.91 | 40 | 2003 | 33 | 17 | 9 | .654 | 33 | 190 | 1 | 1 | 0 | 211.2 | 199 | 92 | 99 | 24 | 58 | 5 | 0 | 1 | 878 | 5 | 8.08 | 2.47 | 3.28 | 1.02 | 21.6 | 6.6 | 1.21 | .291 | 4.21 | 87 | 3.60 | 81 | 8.46 | 20.3 | |
| 11 | | D. Wells | 4.14 | 40 | 2003 | 31 | 15 | 7 | .682 | 30 | 101 | 4 | 1 | 0 | 213.0 | 242 | 98 | 101 | 24 | 20 | 8 | 0 | 0 | 887 | 3 | 4.27 | 0.85 | 5.05 | 1.01 | 11.4 | 2.3 | 1.23 | .297 | 4.27 | 92 | 3.94 | 88 | 10.23 | 12.4 | |
| 12 |  | C. Morton | 4.19 | 40 | 2024 | 30 | 8 | 10 | .444 | 30 | 167 | 0 | 0 | 0 | 165.1 | 154 | 77 | 85 | 23 | 65 | 18 | 0 | 1 | 701 | 2 | 9.09 | 3.54 | 2.57 | 1.25 | 23.8 | 9.3 | 1.32 | .306 | 4.63 | 100 | 4.45 | 112 | 8.38 | -9.1 | |
| 13 |  | G. Maddux | 4.20 | 40 | 2006 | TOT | 34 | 15 | 14 | .517 | 34 | 117 | 0 | 0 | 0 | 210.0 | 219 | 98 | 109 | 20 | 37 | 0 | 0 | 7 | 862 | 0 | 5.01 | 1.59 | 3.16 | 0.86 | 13.6 | 4.3 | 1.22 | .289 | 4.67 | 92 | 3.79 | 83 | 9.39 | 18 |
| 14 | | T. Wakefield | 4.76 | 40 | 2007 | 31 | 17 | 12 | .586 | 31 | 110 | 0 | 0 | 0 | 189.0 | 191 | 100 | 104 | 22 | 64 | 4 | 0 | 1 | 800 | 10 | 5.24 | 3.05 | 1.72 | 1.05 | 13.8 | 8.0 | 1.35 | .282 | 4.95 | 103 | 4.66 | 108 | 9.10 | -8 | |
| 15 | | W. Williams | 5.27 | 40 | 2007 | 33 | 8 | 15 | .348 | 31 | 101 | 0 | 0 | 0 | 188.0 | 216 | 110 | 114 | 35 | 53 | 12 | 0 | 5 | 833 | 1 | 4.84 | 2.54 | 1.91 | 1.68 | 12.1 | 6.4 | 1.43 | .286 | 5.46 | 120 | 5.61 | 124 | 10.34 | -22.2 |
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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
Nationals
Pirates| 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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