47 pitchers are tied for giving up the fewest earned runs by a rookie, with 0 earned runs. The first three are Jhonathan Díaz, Logan Davidson and Garrett Acton this season.
| NAME | ER | SEASON | TM | G | W | L | W% | GS | ERA | SO | CG | SHO | SV | IP | H | 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 |  | J. Díaz | 0 | 2025 |  SEA | 1 | 0 | 0 | 0 | 0.00 | 1 | 0 | 0 | 0 | 1.1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 5 | 0 | 6.75 | 0.00 | 0.00 | 20.0 | 0.0 | 0.75 | .250 | 0.00 | 0 | 1.63 | 41 | 6.75 | 0.4 | ||
| 2 | | J. Espada | 0 | 2025 |  BAL | 1 | 0 | 0 | 0 | 0.00 | 4 | 0 | 0 | 0 | 3.0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 9 | 0 | 12.00 | 0.00 | 0.00 | 44.4 | 0.0 | 0.33 | .200 | 0.00 | 0 | 0.46 | 11 | 3.00 | 1.2 | ||
| 3 | | W. Wilson | 0 | 2025 |  PHI | 2 | 0 | 0 | 0 | 0.00 | 0 | 0 | 0 | 0 | 3.0 | 3 | 0 | 0 | 0 | 0 | 2 | 0 | 12 | 0 | 0.00 | 0.00 | 0.00 | 0.0 | 0.0 | 1.00 | .250 | 0.00 | 0 | 3.13 | 74 | 9.00 | 0.4 | ||
| 4 | | L. Davidson | 0 | 2025 | TOT | 1 | 0 | 0 | 0 | 0.00 | 1 | 0 | 0 | 0 | 1.0 | 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 | 1.13 | 26 | 0.00 | 0.3 | ||
| 5 | | G. Acton | 0 | 2025 |  TBR | 1 | 0 | 0 | 0 | 0.00 | 0 | 0 | 0 | 0 | 1.0 | 0 | 0 | 0 | 2 | 0 | 1 | 0 | 5 | 1 | 0.00 | 18.00 | 0.00 | 0.00 | 0.0 | 40.0 | 2.00 | .000 | 0.00 | 0 | 9.13 | 226 | 0.00 | -0.6 | |
| 6 | | N. Raquet | 0 | 2025 |  STL | 2 | 0 | 0 | 0 | 0.00 | 1 | 0 | 0 | 0 | 2.0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 7 | 0 | 4.50 | 4.50 | 1.00 | 0.00 | 14.3 | 14.3 | 0.50 | .000 | 0.00 | 0 | 3.63 | 90 | 0.00 | 0.1 | |
| 7 | | J. Amaya | 0 | 2025 |  CWS | 1 | 0 | 0 | 0 | 0.00 | 0 | 0 | 0 | 0 | 1.0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 3 | 0 | 0.00 | 0.00 | 0.00 | 0.0 | 0.0 | 0.00 | .000 | 0.00 | 0 | 3.13 | 73 | 0.00 | 0.1 | ||
| 8 | | L. Vázquez | 0 | 2025 | BAL | 4 | 0 | 0 | 0 | 0.00 | 0 | 0 | 0 | 0 | 4.1 | 3 | 0 | 0 | 1 | 0 | 4 | 0 | 14 | 0 | 0.00 | 2.08 | 0.00 | 0.00 | 0.0 | 7.1 | 0.92 | .231 | 0.00 | 0 | 3.82 | 93 | 6.23 | 0.1 | |
| 9 | | J. Young | 0 | 2025 |  NYM | 1 | 0 | 0 | 0 | 0.00 | 0 | 0 | 0 | 0 | 0.1 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 3 | 0 | 0.00 | 27.00 | 0.00 | 0.00 | 0.0 | 33.3 | 6.00 | .500 | 0.00 | 0 | 12.13 | 297 | 27.00 | -0.3 | |
| 10 | | A. Seigler | 0 | 2025 |  MIL | 1 | 0 | 0 | 0 | 0.00 | 0 | 0 | 0 | 0 | 1.0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 4 | 0 | 0.00 | 0.00 | 0.00 | 0.0 | 0.0 | 1.00 | .250 | 0.00 | 0 | 3.13 | 75 | 9.00 | 0.1 | ||
| 11 | | C. Salazar | 0 | 2025 |  HOU | 1 | 0 | 0 | 0 | 0.00 | 0 | 0 | 0 | 0 | 1.0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 4 | 0 | 0.00 | 0.00 | 0.00 | 0.0 | 0.0 | 0.00 | .000 | 0.00 | 0 | 6.13 | 148 | 0.00 | -0.2 | ||
| 12 | | W. MacIver | 0 | 2025 |  ATH | 2 | 0 | 0 | 0 | 0.00 | 0 | 0 | 0 | 0 | 2.0 | 4 | 0 | 0 | 0 | 0 | 2 | 0 | 10 | 0 | 0.00 | 0.00 | 0.00 | 0.0 | 0.0 | 2.00 | .400 | 0.00 | 0 | 3.13 | 75 | 18.00 | 0.2 | ||
| 13 | | C. Koss | 0 | 2025 |  SFG | 4 | 0 | 0 | 0 | 0.00 | 0 | 0 | 0 | 0 | 4.0 | 4 | 0 | 0 | 0 | 0 | 4 | 0 | 16 | 0 | 0.00 | 0.00 | 0.00 | 0.0 | 0.0 | 1.00 | .250 | 0.00 | 0 | 3.13 | 79 | 9.00 | 0.4 | ||
| 14 | | H. Barco | 0 | 2025 |  PIT | 2 | 1 | 0 | 1.000 | 0 | 0.00 | 3 | 0 | 0 | 0 | 3.0 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 12 | 0 | 9.00 | 0.00 | 0.00 | 25.0 | 0.0 | 1.00 | .333 | 0.00 | 0 | 1.13 | 27 | 9.00 | 1 | |
| 15 | | C. Roa | 0 | 2025 |  MIA | 2 | 0 | 0 | 0 | 0.00 | 3 | 0 | 0 | 0 | 3.0 | 1 | 0 | 0 | 3 | 0 | 1 | 0 | 12 | 0 | 9.00 | 9.00 | 1.00 | 0.00 | 25.0 | 25.0 | 1.33 | .167 | 0.00 | 0 | 4.13 | 100 | 3.00 | 0 | |
| 16 | | N. Kavadas | 0 | 2025 |  LAA | 1 | 0 | 0 | 0 | 0.00 | 1 | 0 | 0 | 0 | 1.2 | 3 | 0 | 0 | 1 | 0 | 1 | 0 | 9 | 0 | 5.40 | 5.40 | 1.00 | 0.00 | 11.1 | 11.1 | 2.40 | .429 | 0.00 | 0 | 3.73 | 87 | 16.20 | 0.1 | |
| 17 | | L. Rivas | 0 | 2025 | SEA | 1 | 0 | 0 | 0 | 0.00 | 0 | 0 | 0 | 0 | 1.0 | 3 | 0 | 0 | 1 | 0 | 1 | 0 | 6 | 0 | 0.00 | 9.00 | 0.00 | 0.00 | 0.0 | 16.7 | 4.00 | .600 | 0.00 | 0 | 6.13 | 153 | 27.00 | -0.2 | |
| 18 | | C. Montes De Oca | 0 | 2025 |  AZ | 1 | 0 | 0 | 0 | 0.00 | 2 | 0 | 0 | 0 | 2.2 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 9 | 0 | 6.75 | 3.38 | 2.00 | 0.00 | 22.2 | 11.1 | 0.38 | .000 | 0.00 | 0 | 2.75 | 69 | 0.00 | 0.4 | |
| 19 | | R. Fitzgerald | 0 | 2025 |  MIN | 2 | 0 | 0 | 0 | 0.00 | 0 | 0 | 0 | 0 | 2.0 | 2 | 0 | 0 | 0 | 0 | 2 | 0 | 8 | 0 | 0.00 | 0.00 | 0.00 | 0.0 | 0.0 | 1.00 | .250 | 0.00 | 0 | 3.13 | 75 | 9.00 | 0.2 | ||
| 20 | | D. Hamel | 0 | 2025 | NYM | 1 | 0 | 0 | 0 | 0.00 | 0 | 0 | 0 | 0 | 1.0 | 3 | 0 | 0 | 0 | 1 | 0 | 0 | 6 | 0 | 0.00 | 0.00 | 0.00 | 0.0 | 0.0 | 3.00 | .600 | 0.00 | 0 | 6.13 | 150 | 27.00 | -0.2 | ||
| 21 | | A. Pope | 0 | 2025 | AZ | 1 | 0 | 0 | 0 | 0.00 | 1 | 0 | 0 | 0 | 2.0 | 2 | 0 | 0 | 1 | 0 | 0 | 0 | 9 | 0 | 4.50 | 4.50 | 1.00 | 0.00 | 11.1 | 11.1 | 1.50 | .286 | 0.00 | 0 | 3.63 | 91 | 9.00 | 0.1 | |
| 22 | | E. Alvarez | 0 | 2024 | NYM | 1 | 0 | 0 | 0 | 0.00 | 1 | 0 | 0 | 0 | 1.0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 5 | 0 | 9.00 | 0.00 | 0.00 | 20.0 | 0.0 | 1.00 | .333 | 0.00 | 0 | 4.16 | 104 | 9.00 | 0 | ||
| 23 | | J. Pereda | 0 | 2024 | MIA | 1 | 0 | 0 | 0 | 0.00 | 0 | 0 | 0 | 0 | 0.1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0.00 | 0.00 | 0.00 | 0.0 | 0.0 | 0.00 | .000 | 0.00 | 0 | 3.16 | 78 | 0.00 | 0 | ||
| 24 | | F. Whitley | 0 | 2024 | HOU | 3 | 0 | 0 | 0 | 0.00 | 5 | 0 | 0 | 0 | 3.1 | 5 | 2 | 0 | 3 | 1 | 2 | 0 | 20 | 0 | 13.50 | 8.10 | 1.67 | 0.00 | 25.0 | 15.0 | 2.40 | .455 | 5.40 | 0 | 3.76 | 93 | 13.50 | 0.1 | |
| 25 | | W. Wilson | 0 | 2024 | PHI | 1 | 0 | 0 | 0 | 0.00 | 0 | 0 | 0 | 0 | 1.0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 4 | 0 | 0.00 | 0.00 | 0.00 | 0.0 | 0.0 | 1.00 | .250 | 0.00 | 0 | 3.16 | 76 | 9.00 | 0.1 | ||
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