Between the 1989 and 2014 seasons, 50 pitchers were tied for losing the fewest games by a rookie, with 0 games in 2014. The first three are A.J. Achter, Austin Adams and Dario Alvarez.
| NAME | L | SEASON | TM | W | L% | G | W% | GS | ERA | 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 |  | A.J. Achter | 0 | 2014 |  MIN | 1 | .000 | 7 | 1.000 | 0 | 3.27 | 5 | 0 | 0 | 0 | 11.0 | 14 | 4 | 7 | 2 | 3 | 0 | 1 | 0 | 49 | 0 | 4.09 | 2.45 | 1.67 | 1.64 | 10.2 | 6.1 | 1.55 | .308 | 5.73 | 84 | 5.40 | 141 | 11.45 | -1.9 |
| 2 | | A. Adams | 0 | 2014 |  CLE | 0 | 6 | 0 | 9.00 | 4 | 0 | 0 | 0 | 7.0 | 9 | 7 | 7 | 1 | 1 | 0 | 1 | 0 | 30 | 0 | 5.14 | 1.29 | 4.00 | 1.29 | 13.3 | 3.3 | 1.43 | .333 | 9.00 | 231 | 4.27 | 112 | 11.57 | -0.3 | ||
| 3 | | D. Alvarez | 0 | 2014 |  NYM | 0 | 4 | 0 | 13.50 | 1 | 0 | 0 | 0 | 1.1 | 4 | 2 | 2 | 1 | 0 | 0 | 0 | 0 | 8 | 0 | 6.75 | 0.00 | 6.75 | 12.5 | 0.0 | 3.00 | .500 | 13.50 | 388 | 11.38 | 309 | 27.00 | -1.1 | |||
| 4 | | J. Alvarez | 0 | 2014 |  LAA | 0 | 2 | 0 | 0.00 | 1 | 0 | 0 | 0 | 0.2 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 3 | 0 | 13.50 | 0.00 | 0.00 | 33.3 | 0.0 | 1.50 | .500 | 0.00 | 0 | 0.13 | 3 | 13.50 | 0.3 | |||
| 5 | | R.J. Alvarez | 0 | 2014 |  SDP | 0 | 10 | 0 | 1.13 | 9 | 0 | 0 | 0 | 8.0 | 3 | 1 | 1 | 0 | 5 | 1 | 4 | 1 | 33 | 1 | 10.13 | 5.63 | 1.80 | 0.00 | 27.3 | 15.2 | 1.00 | .167 | 1.13 | 32 | 3.13 | 87 | 3.38 | 0.4 | ||
| 6 | | D. Anna | 0 | 2014 |  NYY | 0 | 1 | 0 | 18.00 | 0 | 0 | 0 | 0 | 1.0 | 3 | 2 | 2 | 0 | 0 | 0 | 1 | 0 | 6 | 0 | 0.00 | 0.00 | 0.00 | 0.0 | 0.0 | 3.00 | .500 | 18.00 | 467 | 3.13 | 79 | 27.00 | 0.1 | |||
| 7 | | P. Baez | 0 | 2014 |  LAD | 0 | 20 | 0 | 2.63 | 18 | 0 | 0 | 0 | 24.0 | 16 | 7 | 7 | 3 | 5 | 0 | 8 | 1 | 92 | 0 | 6.75 | 1.88 | 3.60 | 1.13 | 19.6 | 5.4 | 0.88 | .197 | 2.63 | 76 | 3.88 | 107 | 6.00 | -0.7 | ||
| 8 | | M. Barnes | 0 | 2014 |  BOS | 0 | 5 | 0 | 4.00 | 8 | 0 | 0 | 0 | 9.0 | 11 | 4 | 4 | 1 | 2 | 0 | 3 | 0 | 39 | 0 | 8.00 | 2.00 | 4.00 | 1.00 | 20.5 | 5.1 | 1.44 | .357 | 4.00 | 100 | 3.46 | 92 | 11.00 | 0.3 | ||
| 9 | | A. Barrett | 0 | 2014 |  WSH | 3 | .000 | 50 | 1.000 | 0 | 2.66 | 49 | 0 | 0 | 0 | 40.2 | 33 | 12 | 17 | 1 | 20 | 1 | 12 | 2 | 174 | 6 | 10.84 | 4.43 | 2.45 | 0.22 | 28.2 | 11.5 | 1.30 | .311 | 3.76 | 73 | 2.59 | 71 | 7.30 | 4.8 |
| 10 | | J. Beliveau | 0 | 2014 |  TBR | 0 | 30 | 0 | 2.63 | 28 | 0 | 0 | 1 | 24.0 | 19 | 7 | 7 | 1 | 7 | 2 | 6 | 1 | 100 | 1 | 10.50 | 2.63 | 4.00 | 0.38 | 28.0 | 7.0 | 1.08 | .290 | 2.63 | 71 | 2.46 | 67 | 7.13 | 3.3 | ||
| 11 | | D. Betances | 0 | 2014 | NYY | 5 | .000 | 70 | 1.000 | 0 | 1.40 | 135 | 0 | 0 | 1 | 90.0 | 46 | 14 | 15 | 4 | 24 | 4 | 8 | 1 | 341 | 2 | 13.50 | 2.40 | 5.63 | 0.40 | 39.6 | 7.0 | 0.78 | .241 | 1.50 | 36 | 1.64 | 42 | 4.60 | 22.2 |
| 12 | | B. Billings | 0 | 2014 | NYY | 0 | 1 | 0 | 9.00 | 7 | 0 | 0 | 0 | 4.0 | 4 | 4 | 4 | 2 | 1 | 0 | 0 | 0 | 17 | 0 | 15.75 | 2.25 | 7.00 | 4.50 | 41.2 | 5.9 | 1.25 | .286 | 9.00 | 234 | 6.88 | 175 | 9.00 | -1.3 | ||
| 13 | | B. Bochy | 0 | 2014 |  SFG | 0 | 3 | 0 | 5.40 | 3 | 0 | 0 | 0 | 3.1 | 1 | 2 | 2 | 1 | 2 | 1 | 2 | 0 | 14 | 0 | 8.10 | 5.40 | 1.50 | 2.70 | 21.4 | 14.3 | 0.90 | .000 | 5.40 | 155 | 7.93 | 226 | 2.70 | -1.7 | ||
| 14 | | L. Bonilla | 0 | 2014 |  TEX | 3 | .000 | 5 | 1.000 | 3 | 3.05 | 17 | 0 | 0 | 0 | 20.2 | 13 | 7 | 8 | 2 | 12 | 1 | 0 | 1 | 83 | 1 | 7.40 | 5.23 | 1.42 | 0.87 | 20.5 | 14.5 | 1.21 | .216 | 3.48 | 77 | 4.63 | 121 | 5.66 | -1.8 |
| 15 | | D. Britton | 0 | 2014 | BOS | 0 | 7 | 0 | 0.00 | 4 | 0 | 0 | 0 | 6.2 | 5 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 27 | 0 | 5.40 | 2.70 | 2.00 | 0.00 | 14.8 | 7.4 | 1.05 | .238 | 0.00 | 0 | 2.83 | 75 | 6.75 | 0.7 | ||
| 16 | | R. Buchter | 0 | 2014 |  ATL | 1 | .000 | 1 | 1.000 | 0 | 0.00 | 1 | 0 | 0 | 0 | 1.0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 3 | 0 | 9.00 | 9.00 | 1.00 | 0.00 | 33.3 | 33.3 | 1.00 | .000 | 0.00 | 0 | 4.13 | 115 | 0.00 | -0.1 |
| 17 | | F. Bueno | 0 | 2014 |  KCR | 0 | 30 | 0 | 4.18 | 20 | 0 | 0 | 0 | 32.1 | 36 | 15 | 16 | 3 | 7 | 1 | 8 | 2 | 142 | 1 | 5.57 | 1.95 | 2.86 | 0.84 | 14.1 | 4.9 | 1.33 | .297 | 4.45 | 106 | 3.84 | 102 | 10.02 | -0.3 | ||
| 18 | | K. Butler | 0 | 2014 |  STL | 0 | 2 | 0 | 27.00 | 2 | 0 | 0 | 0 | 2.0 | 6 | 6 | 6 | 0 | 1 | 1 | 1 | 0 | 14 | 0 | 9.00 | 4.50 | 2.00 | 0.00 | 14.3 | 7.1 | 3.50 | .600 | 27.00 | 753 | 4.13 | 113 | 27.00 | -0.1 | ||
| 19 | | C. Cabral | 0 | 2014 | NYY | 0 | 4 | 0 | 27.00 | 2 | 0 | 0 | 0 | 1.0 | 4 | 3 | 3 | 0 | 2 | 3 | 0 | 0 | 12 | 1 | 18.00 | 18.00 | 1.00 | 0.00 | 16.7 | 16.7 | 6.00 | .800 | 27.00 | 701 | 14.13 | 359 | 36.00 | -1.1 | ||
| 20 | | L. Campos | 0 | 2014 | SDP | 0 | 6 | 0 | 5.14 | 9 | 0 | 0 | 0 | 7.0 | 9 | 4 | 5 | 0 | 4 | 0 | 1 | 0 | 33 | 2 | 11.57 | 5.14 | 2.25 | 0.00 | 27.3 | 12.1 | 1.86 | .450 | 6.43 | 148 | 2.27 | 63 | 11.57 | 1.1 | ||
| 21 | | K. Chapman | 0 | 2014 |  HOU | 2 | .000 | 21 | 1.000 | 0 | 4.64 | 19 | 0 | 0 | 0 | 21.1 | 22 | 11 | 11 | 3 | 11 | 0 | 1 | 0 | 97 | 0 | 8.02 | 4.64 | 1.73 | 1.27 | 19.6 | 11.3 | 1.55 | .297 | 4.64 | 124 | 4.72 | 126 | 9.28 | -2.3 |
| 22 | | A. Claudio | 0 | 2014 | TEX | 0 | 15 | 0 | 2.92 | 14 | 0 | 0 | 0 | 12.1 | 14 | 4 | 4 | 0 | 4 | 0 | 5 | 0 | 54 | 0 | 10.22 | 2.92 | 3.50 | 0.00 | 25.9 | 7.4 | 1.46 | .389 | 2.92 | 74 | 1.83 | 48 | 10.22 | 2.7 | ||
| 23 | | A. Colome | 0 | 2014 | TBR | 2 | .000 | 5 | 1.000 | 3 | 2.66 | 13 | 0 | 0 | 0 | 23.2 | 19 | 7 | 7 | 1 | 10 | 0 | 1 | 0 | 97 | 3 | 4.94 | 3.80 | 1.30 | 0.38 | 13.4 | 10.3 | 1.23 | .247 | 2.66 | 72 | 3.85 | 105 | 7.23 | -0.5 |
| 24 | | E. Cordier | 0 | 2014 | SFG | 0 | 7 | 0 | 1.50 | 9 | 0 | 0 | 0 | 6.0 | 5 | 1 | 4 | 0 | 2 | 3 | 2 | 0 | 28 | 1 | 13.50 | 3.00 | 4.50 | 0.00 | 32.1 | 7.1 | 1.17 | .357 | 6.00 | 43 | 2.63 | 75 | 7.50 | 0.6 | ||
| 25 | | D. Coulombe | 0 | 2014 | LAD | 0 | 5 | 0 | 4.15 | 4 | 0 | 0 | 0 | 4.1 | 5 | 2 | 3 | 1 | 2 | 0 | 0 | 0 | 22 | 2 | 8.31 | 4.15 | 2.00 | 2.08 | 18.2 | 9.1 | 1.62 | .267 | 6.23 | 120 | 5.67 | 157 | 10.38 | -1 | ||
Guardians
Tigers
White Sox
BAL
Phillies
Brewers
Cubs
Padres
Blue Jays
Mariners
CIN
ATH
AZ
