Since 1950, Lou Kretlow has the worst ERA by a starting pitcher in a season, with an ERA of 270.00 in 1950.
| NAME | ERA | 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 | H/9 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | L. Kretlow | 270.00 | 1950 | TOT | 3 | 0 | 2 | .000 | 3 | 0 | 0 | 0 | 0 | 0.1 | 5 | 10 | 10 | 0 | 8 | 0 | 0 | 14 | 0 | 0.00 | 216.00 | 0.00 | 0.00 | 0.0 | 57.1 | 39.00 | .833 | 270.00 | 135.00 | |
| 2 |  | N. Cortes | 189.00 | 2020 | 1 | 0 | 1 | .000 | 1 | 1 | 0 | 0 | 0 | 0.1 | 5 | 7 | 8 | 2 | 2 | 0 | 0 | 0 | 9 | 0 | 27.00 | 54.00 | 0.50 | 54.00 | 11.1 | 22.2 | 21.00 | .750 | 216.00 | 135.00 | |
| 3 | | T.J. McFarland | 189.00 | 2017 | 1 | 0 | 1 | .000 | 1 | 0 | 0 | 0 | 0 | 0.1 | 5 | 7 | 7 | 0 | 2 | 0 | 0 | 0 | 8 | 0 | 0.00 | 54.00 | 0.00 | 0.00 | 0.0 | 25.0 | 21.00 | .833 | 189.00 | 135.00 | |
| 4 | | D. Altavilla | 135.00 | 2024 | 1 | 0 | 1 | .000 | 1 | 1 | 0 | 0 | 0 | 0.1 | 3 | 5 | 5 | 0 | 2 | 0 | 0 | 0 | 6 | 0 | 27.00 | 54.00 | 0.50 | 0.00 | 16.7 | 33.3 | 15.00 | 1.000 | 135.00 | 81.00 | |
| 5 | | B. Henley | 135.00 | 2024 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0.1 | 4 | 5 | 5 | 0 | 3 | 1 | 0 | 0 | 9 | 0 | 0.00 | 81.00 | 0.00 | 0.00 | 0.0 | 33.3 | 21.00 | .800 | 135.00 | 108.00 | ||
| 6 | | M. Feliz | 135.00 | 2019 | 1 | 0 | 1 | .000 | 1 | 0 | 0 | 0 | 0 | 0.1 | 4 | 5 | 5 | 1 | 1 | 0 | 0 | 0 | 6 | 0 | 0.00 | 27.00 | 0.00 | 27.00 | 0.0 | 16.7 | 15.00 | .750 | 135.00 | 108.00 | |
| 7 | | R. Meisinger | 135.00 | 2018 | 1 | 0 | 1 | .000 | 1 | 0 | 0 | 0 | 0 | 0.1 | 4 | 5 | 5 | 0 | 1 | 0 | 0 | 0 | 6 | 0 | 0.00 | 27.00 | 0.00 | 0.00 | 0.0 | 16.7 | 15.00 | .800 | 135.00 | 108.00 | |
| 8 | | J. Venters | 135.00 | 2018 | 1 | 0 | 1 | .000 | 1 | 1 | 0 | 0 | 0 | 0.1 | 3 | 5 | 5 | 0 | 2 | 0 | 0 | 0 | 6 | 0 | 27.00 | 54.00 | 0.50 | 0.00 | 16.7 | 33.3 | 15.00 | 1.000 | 135.00 | 81.00 | |
| 9 | | J. Guthrie | 135.00 | 2017 | 1 | 0 | 1 | .000 | 1 | 0 | 0 | 0 | 0 | 0.2 | 6 | 10 | 10 | 0 | 4 | 0 | 0 | 0 | 12 | 0 | 0.00 | 54.00 | 0.00 | 0.00 | 0.0 | 33.3 | 15.00 | .750 | 135.00 | 81.00 | |
| 10 | | R. Lamb | 135.00 | 1973 | 1 | 0 | 1 | .000 | 1 | 0 | 0 | 0 | 0 | 0.1 | 5 | 5 | 5 | 1 | 1 | 0 | 0 | 0 | 6 | 0 | 0.00 | 27.00 | 0.00 | 27.00 | 0.0 | 16.7 | 18.00 | 1.000 | 135.00 | 135.00 | |
| 11 | | L. Jackson | 135.00 | 1956 | 1 | 0 | 1 | .000 | 1 | 0 | 0 | 0 | 0 | 0.1 | 4 | 5 | 5 | 0 | 2 | 0 | 0 | 0 | 7 | 0 | 0.00 | 54.00 | 0.00 | 0.00 | 0.0 | 28.6 | 18.00 | .800 | 135.00 | 108.00 | |
| 12 |  | C. Sánchez | 108.00 | 2021 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0.1 | 3 | 4 | 4 | 0 | 1 | 0 | 0 | 0 | 5 | 0 | 27.00 | 27.00 | 1.00 | 0.00 | 20.0 | 20.0 | 12.00 | 1.000 | 108.00 | 81.00 | ||
| 13 | | T. Hearn | 108.00 | 2019 | 1 | 0 | 1 | .000 | 1 | 0 | 0 | 0 | 0 | 0.1 | 3 | 4 | 5 | 0 | 4 | 0 | 0 | 0 | 8 | 0 | 0.00 | 108.00 | 0.00 | 0.00 | 0.0 | 50.0 | 21.00 | .750 | 135.00 | 81.00 | |
| 14 | | O. Garcia | 108.00 | 2017 | 1 | 0 | 1 | .000 | 1 | 0 | 0 | 0 | 0 | 0.1 | 4 | 4 | 4 | 0 | 1 | 0 | 0 | 0 | 6 | 0 | 0.00 | 27.00 | 0.00 | 0.00 | 0.0 | 16.7 | 15.00 | .800 | 108.00 | 108.00 | |
| 15 | | J. Fernandez | 108.00 | 2004 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0.1 | 3 | 4 | 4 | 0 | 3 | 0 | 0 | 0 | 7 | 0 | 0.00 | 81.00 | 0.00 | 0.00 | 0.0 | 42.9 | 18.00 | .750 | 108.00 | 81.00 | ||
| 16 | | R. Bordi | 108.00 | 1982 | 2 | 0 | 2 | .000 | 2 | 0 | 0 | 0 | 0 | 0.2 | 9 | 8 | 8 | 2 | 0 | 0 | 0 | 0 | 11 | 0 | 0.00 | 0.00 | 27.00 | 0.0 | 0.0 | 13.50 | .778 | 108.00 | 121.50 | ||
| 17 | | B. Sykes | 108.00 | 1981 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0.1 | 4 | 4 | 4 | 0 | 1 | 0 | 0 | 0 | 6 | 1 | 0.00 | 27.00 | 0.00 | 0.00 | 0.0 | 16.7 | 15.00 | .800 | 108.00 | 108.00 | ||
| 18 | | P. Lovrich | 108.00 | 1963 | 1 | 0 | 1 | .000 | 1 | 1 | 0 | 0 | 0 | 0.1 | 5 | 4 | 4 | 0 | 1 | 0 | 0 | 1 | 7 | 0 | 27.00 | 27.00 | 1.00 | 0.00 | 14.3 | 14.3 | 18.00 | 1.000 | 108.00 | 135.00 | |
| 19 | | A. Brooks | 94.50 | 2014 | 1 | 0 | 1 | .000 | 1 | 0 | 0 | 0 | 0 | 0.2 | 5 | 7 | 7 | 0 | 3 | 2 | 0 | 0 | 11 | 0 | 0.00 | 40.50 | 0.00 | 0.00 | 0.0 | 27.3 | 12.00 | .833 | 94.50 | 67.50 | |
| 20 | | B. Raggio | 94.50 | 1998 | 1 | 0 | 1 | .000 | 1 | 0 | 0 | 0 | 0 | 0.2 | 9 | 7 | 7 | 0 | 2 | 0 | 0 | 0 | 12 | 0 | 0.00 | 27.00 | 0.00 | 0.00 | 0.0 | 16.7 | 16.50 | .900 | 94.50 | 121.50 | |
| 21 | | J. Jackson | 81.00 | 2021 | 1 | 0 | 1 | .000 | 1 | 1 | 0 | 0 | 0 | 0.1 | 1 | 3 | 3 | 1 | 2 | 0 | 0 | 0 | 4 | 0 | 27.00 | 54.00 | 0.50 | 27.00 | 25.0 | 50.0 | 9.00 | 81.00 | 27.00 | ||
| 22 | | A. Santos | 81.00 | 2020 | 1 | 0 | 1 | .000 | 1 | 1 | 0 | 0 | 0 | 0.2 | 5 | 6 | 6 | 0 | 2 | 1 | 0 | 0 | 10 | 0 | 13.50 | 27.00 | 0.50 | 0.00 | 10.0 | 20.0 | 10.50 | .833 | 81.00 | 67.50 | |
| 23 | | H. Rondon | 81.00 | 2019 | 1 | 0 | 1 | .000 | 1 | 1 | 0 | 0 | 0 | 0.2 | 5 | 6 | 6 | 0 | 1 | 1 | 0 | 0 | 9 | 0 | 13.50 | 13.50 | 1.00 | 0.00 | 11.1 | 11.1 | 9.00 | .833 | 81.00 | 67.50 | |
| 24 | | R. Madson | 81.00 | 2004 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0.2 | 6 | 6 | 6 | 3 | 1 | 0 | 0 | 0 | 9 | 0 | 0.00 | 13.50 | 0.00 | 40.50 | 0.0 | 11.1 | 10.50 | .600 | 81.00 | 81.00 | ||
| 25 | | K. Ojala | 81.00 | 1999 | 1 | 0 | 1 | .000 | 1 | 0 | 0 | 0 | 0 | 0.2 | 6 | 6 | 6 | 0 | 2 | 0 | 0 | 0 | 9 | 0 | 0.00 | 27.00 | 0.00 | 0.00 | 0.0 | 22.2 | 12.00 | .857 | 81.00 | 81.00 | |
SEA
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PIT
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WSH
CLE
STL
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SEA
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FLAStatMuse has game-level data for ERA going back to the 1901 season.
Some of the information used here was obtained free of charge from Retrosheet.
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