50 pitchers were tied for the lowest ERA by a relief pitcher in 2023, with an ERA of 0.00. The first three are Janson Junk, Frankie Montas Jr. and Cristopher Sánchez.
| 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 |  | J. Junk | 0.00 | 2023 |  MIL | 1 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 2.2 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 9 | 0 | 10.13 | 0.00 | 0.00 | 33.3 | 0.0 | 0.38 | .167 | 0.00 | 3.38 | ||
| 2 | | F. Montas Jr. | 0.00 | 2023 |  NYY | 1 | 1 | 0 | 1.000 | 0 | 1 | 0 | 0 | 0 | 1.1 | 2 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 7 | 0 | 6.75 | 6.75 | 1.00 | 0.00 | 14.3 | 14.3 | 2.25 | .400 | 0.00 | 13.50 |
| 3 |  | C. Sánchez | 0.00 | 2023 |  PHI | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 3 | 0 | 9.00 | 0.00 | 0.00 | 33.3 | 0.0 | 0.00 | .000 | 0.00 | 0.00 | ||
| 4 | | J. Taillon | 0.00 | 2023 |  CHC | 1 | 0 | 0 | 0 | 3 | 0 | 0 | 1 | 4.0 | 3 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 16 | 0 | 6.75 | 2.25 | 3.00 | 0.00 | 18.8 | 6.3 | 1.00 | .250 | 0.00 | 6.75 | |
| 5 | | T. Rainey | 0.00 | 2023 |  WSH | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1.0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 5 | 1 | 9.00 | 9.00 | 1.00 | 0.00 | 20.0 | 20.0 | 2.00 | .333 | 0.00 | 9.00 | |
| 6 | | J. Bowlan | 0.00 | 2023 |  KCR | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1.0 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 5 | 0 | 9.00 | 0.00 | 0.00 | 20.0 | 0.0 | 2.00 | .500 | 0.00 | 18.00 | ||
| 7 | | Y. Gómez | 0.00 | 2023 | NYY | 1 | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 2.0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 8 | 0 | 18.00 | 0.00 | 0.00 | 50.0 | 0.0 | 0.50 | .333 | 0.00 | 4.50 | ||
| 8 | | R. Nelson | 0.00 | 2023 |  ARI | 2 | 1 | 0 | 1.000 | 0 | 5 | 0 | 0 | 0 | 5.2 | 1 | 0 | 0 | 0 | 2 | 0 | 1 | 0 | 20 | 0 | 7.94 | 3.18 | 2.50 | 0.00 | 25.0 | 10.0 | 0.53 | .077 | 0.00 | 1.59 |
| 9 | | A. Veneziano | 0.00 | 2023 | KCR | 2 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 2.1 | 2 | 0 | 2 | 0 | 2 | 0 | 1 | 0 | 12 | 0 | 3.86 | 7.71 | 0.50 | 0.00 | 8.3 | 16.7 | 1.71 | .222 | 7.71 | 7.71 | |
| 10 | | J. Espada | 0.00 | 2023 |  SDP | 1 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 1.0 | 0 | 0 | 0 | 0 | 2 | 0 | 1 | 0 | 5 | 0 | 18.00 | 18.00 | 1.00 | 0.00 | 40.0 | 40.0 | 2.00 | .000 | 0.00 | 0.00 | |
| 11 | | R. Tellez | 0.00 | 2023 | MIL | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1.0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 4 | 0 | 9.00 | 0.00 | 0.00 | 25.0 | 0.0 | 1.00 | .333 | 0.00 | 9.00 | ||
| 12 | | J. Latz | 0.00 | 2023 |  TEX | 3 | 0 | 0 | 0 | 5 | 0 | 0 | 0 | 6.1 | 1 | 0 | 0 | 0 | 3 | 0 | 2 | 0 | 22 | 0 | 7.11 | 4.26 | 1.67 | 0.00 | 22.7 | 13.6 | 0.63 | .071 | 0.00 | 1.42 | |
| 13 |  | M. Stroman | 0.00 | 2023 | CHC | 2 | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 3.0 | 2 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 12 | 0 | 12.00 | 3.00 | 4.00 | 0.00 | 33.3 | 8.3 | 1.00 | .286 | 3.00 | 6.00 | |
| 14 | | S. Zavala | 0.00 | 2023 | ARI | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.2 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 2 | 0 | 0.00 | 0.00 | 0.00 | 0.0 | 0.0 | 0.00 | .000 | 0.00 | 0.00 | ||
| 15 | | K. Hurt | 0.00 | 2023 |  LAD | 1 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 2.0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 6 | 0 | 13.50 | 0.00 | 0.00 | 50.0 | 0.0 | 0.00 | .000 | 0.00 | 0.00 | ||
| 16 | | T. Vieira | 0.00 | 2023 | MIL | 2 | 0 | 1 | .000 | 0 | 2 | 0 | 0 | 0 | 3.0 | 0 | 0 | 1 | 0 | 1 | 0 | 2 | 0 | 10 | 0 | 6.00 | 3.00 | 2.00 | 0.00 | 20.0 | 10.0 | 0.33 | .000 | 3.00 | 0.00 |
| 17 | | L. Little | 0.00 | 2023 | CHC | 7 | 0 | 0 | 0 | 12 | 0 | 0 | 0 | 6.2 | 5 | 0 | 0 | 0 | 4 | 1 | 3 | 0 | 30 | 1 | 16.20 | 5.40 | 3.00 | 0.00 | 40.0 | 13.3 | 1.35 | .385 | 0.00 | 6.75 | |
| 18 | | A. Saalfrank | 0.00 | 2023 | ARI | 10 | 0 | 0 | 0 | 6 | 0 | 0 | 0 | 10.1 | 7 | 0 | 2 | 0 | 4 | 0 | 0 | 1 | 41 | 0 | 5.23 | 3.48 | 1.50 | 0.00 | 14.6 | 9.8 | 1.06 | .226 | 1.74 | 6.10 | |
| 19 | | S. Greene | 0.00 | 2023 | CHC | 2 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 3.0 | 2 | 0 | 0 | 0 | 2 | 0 | 2 | 0 | 12 | 0 | 9.00 | 6.00 | 1.50 | 0.00 | 25.0 | 16.7 | 1.33 | .286 | 0.00 | 6.00 | |
| 20 | | A. Faedo | 0.00 | 2023 |  DET | 3 | 0 | 0 | 0 | 7 | 0 | 0 | 0 | 6.0 | 1 | 0 | 0 | 0 | 2 | 0 | 2 | 0 | 20 | 0 | 10.50 | 3.00 | 3.50 | 0.00 | 35.0 | 10.0 | 0.50 | .091 | 0.00 | 1.50 | |
| 21 | | J. McCann | 0.00 | 2023 |  BAL | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 2 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 5 | 0 | 0.00 | 0.00 | 0.00 | 0.0 | 0.0 | 2.00 | .400 | 0.00 | 18.00 | ||
| 22 |  | H. Brown | 0.00 | 2023 |  HOU | 2 | 1 | 0 | 1.000 | 0 | 1 | 0 | 0 | 0 | 3.0 | 1 | 0 | 0 | 0 | 2 | 0 | 1 | 0 | 11 | 0 | 3.00 | 6.00 | 0.50 | 0.00 | 9.1 | 18.2 | 1.00 | .125 | 0.00 | 3.00 |
| 23 | | R. Ryan | 0.00 | 2023 |  SEA | 1 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 4 | 0 | 18.00 | 9.00 | 2.00 | 0.00 | 50.0 | 25.0 | 1.00 | .000 | 0.00 | 0.00 | |
| 24 | | H. Danner | 0.00 | 2023 |  TOR | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0.00 | 0.00 | 0.00 | 0.0 | 0.0 | 0.00 | .000 | 0.00 | 0.00 | ||
| 25 | | J.P. France | 0.00 | 2023 | HOU | 1 | 1 | 0 | 1.000 | 0 | 4 | 0 | 0 | 0 | 3.1 | 3 | 0 | 1 | 0 | 3 | 0 | 0 | 0 | 17 | 1 | 10.80 | 8.10 | 1.33 | 0.00 | 23.5 | 17.6 | 1.80 | .300 | 2.70 | 8.10 |
StatMuse 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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