49 pitchers are tied for losing the most games in a game, with 1 game. The first three are Kumar Rocker, Jordan Romano and Brock Burke yesterday.
Interpreted as:
biggest loss by a player in an MLB regular-season game| NAME | L | DATE | TM | OPP | DEC | W | L% | GS | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | K. Rocker | 1 | 6/4/2025 |  TEX | @ |  TBR | L | 0 | 1.000 | 1 | 13.50 | 5 | 0 | 0 | 0 | 3.1 | 6 | 5 | 5 | 1 | 2 | 1 | 0 | 0 | 19 | 1 |
| 2 |  | J. Romano | 1 | 6/4/2025 |  PHI | @ |  TOR | L | 0 | 1.000 | 0 | 13.50 | 1 | 0 | 0 | 0 | 0.2 | 2 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 4 | 0 |
| 3 |  | B. Burke | 1 | 6/4/2025 |  LAA | @ |  BOS | L | 0 | 1.000 | 0 | 18.00 | 1 | 0 | 0 | 0 | 1.0 | 3 | 2 | 2 | 1 | 1 | 0 | 1 | 0 | 7 | 0 |
| 4 |  | R. Gusto | 1 | 6/4/2025 |  HOU | @ |  PIT | L | 0 | 1.000 | 1 | 6.23 | 3 | 0 | 0 | 0 | 4.1 | 8 | 3 | 3 | 0 | 2 | 1 | 0 | 0 | 23 | 0 |
| 5 |  | M. Boyd | 1 | 6/4/2025 |  CHC | @ |  WSH | L | 0 | 1.000 | 1 | 2.45 | 6 | 0 | 0 | 0 | 7.1 | 4 | 2 | 2 | 1 | 1 | 0 | 0 | 0 | 26 | 0 |
| 6 |  | C. Sale | 1 | 6/4/2025 |  ATL | vs |  AZ | L | 0 | 1.000 | 1 | 1.50 | 10 | 0 | 0 | 0 | 6.0 | 3 | 1 | 1 | 0 | 4 | 1 | 0 | 0 | 25 | 0 |
| 7 |  | J. Adam | 1 | 6/4/2025 |  SDP | @ |  SFG | L | 0 | 1.000 | 0 | 9.00 | 1 | 0 | 0 | 0 | 1.0 | 2 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 6 | 0 |
| 8 |  | C. Vargas | 1 | 6/4/2025 |  SEA | vs |  BAL | L | 0 | 1.000 | 0 | 27.00 | 0 | 0 | 0 | 0 | 0.1 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 3 | 0 |
| 9 |  | C. Schmidt | 1 | 6/4/2025 |  NYY | vs |  CLE | L | 0 | 1.000 | 1 | 4.76 | 8 | 0 | 0 | 0 | 5.2 | 7 | 3 | 3 | 1 | 1 | 0 | 0 | 0 | 25 | 0 |
| 10 |  | A. Abbott | 1 | 6/4/2025 |  CIN | vs |  MIL | L | 0 | 1.000 | 1 | 7.50 | 6 | 0 | 0 | 0 | 6.0 | 7 | 5 | 5 | 2 | 1 | 0 | 0 | 0 | 26 | 0 |
| 11 |  | J. Sterner | 1 | 6/4/2025 |  ATH | vs |  MIN | L | 0 | 1.000 | 1 | 9.00 | 1 | 0 | 0 | 0 | 1.0 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 4 | 0 |
| 12 |  | T. Gonsolin | 1 | 6/4/2025 |  LAD | vs |  NYM | L | 0 | 1.000 | 1 | 3.60 | 6 | 0 | 0 | 0 | 5.0 | 3 | 2 | 3 | 1 | 3 | 1 | 0 | 0 | 22 | 0 |
| 13 |  | B. Eisert | 1 | 6/4/2025 |  CWS | vs |  DET | L | 0 | 1.000 | 0 | 9.00 | 1 | 0 | 0 | 0 | 1.0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 4 | 0 |
| 14 |  | C. Quantrill | 1 | 6/4/2025 |  MIA | vs |  COL | L | 0 | 1.000 | 1 | 3.60 | 2 | 0 | 0 | 0 | 5.0 | 5 | 2 | 2 | 0 | 1 | 0 | 0 | 0 | 20 | 1 |
| 15 |  | T. Williams | 1 | 6/3/2025 | WSH | vs | CHC | L | 0 | 1.000 | 1 | 10.38 | 4 | 0 | 0 | 0 | 4.1 | 5 | 5 | 5 | 0 | 1 | 0 | 0 | 0 | 20 | 0 |
| 16 | | A. Bender | 1 | 6/3/2025 | MIA | vs | COL | L | 0 | 1.000 | 0 | 9.00 | 1 | 0 | 0 | 0 | 1.0 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 4 | 0 |
| 17 |  | P. Skenes | 1 | 6/3/2025 | PIT | vs | HOU | L | 0 | 1.000 | 1 | 1.13 | 8 | 0 | 0 | 0 | 8.0 | 3 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 27 | 0 |
| 18 | | J. Lopez | 1 | 6/3/2025 | ATH | vs | MIN | L | 0 | 1.000 | 0 | 10.38 | 9 | 0 | 0 | 0 | 4.1 | 5 | 5 | 5 | 3 | 1 | 1 | 0 | 0 | 20 | 0 |
| 19 |  | S. Bivens | 1 | 6/3/2025 | SFG | vs | SDP | L | 0 | 1.000 | 0 | 0.00 | 0 | 0 | 0 | 0 | 1.0 | 2 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 5 | 0 |
| 20 |  | F. Peralta | 1 | 6/3/2025 | MIL | @ | CIN | L | 0 | 1.000 | 1 | 4.50 | 9 | 0 | 0 | 0 | 6.0 | 7 | 3 | 3 | 1 | 3 | 0 | 0 | 0 | 27 | 0 |
| 21 |  | J. Buttó | 1 | 6/3/2025 | NYM | @ | LAD | L | 0 | 1.000 | 0 | 0.00 | 0 | 0 | 0 | 0 | 0.1 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 3 | 0 |
| 22 |  | T. Bibee | 1 | 6/3/2025 | CLE | @ | NYY | L | 0 | 1.000 | 1 | 4.26 | 6 | 0 | 0 | 0 | 6.1 | 4 | 3 | 3 | 2 | 2 | 0 | 0 | 0 | 26 | 0 |
| 23 | | G. Kirby | 1 | 6/3/2025 | SEA | vs | BAL | L | 0 | 1.000 | 1 | 3.60 | 3 | 0 | 0 | 0 | 5.0 | 8 | 2 | 2 | 0 | 1 | 0 | 0 | 0 | 23 | 0 |
| 24 |  | Z. Kelly | 1 | 6/3/2025 | BOS | vs | LAA | L | 0 | 1.000 | 0 | 0.00 | 0 | 0 | 0 | 0 | 1.0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 4 | 0 |
| 25 | | T. Mahle | 1 | 6/3/2025 | TEX | @ | TBR | L | 0 | 1.000 | 1 | 6.75 | 5 | 0 | 0 | 0 | 5.1 | 5 | 4 | 4 | 1 | 2 | 0 | 0 | 0 | 23 | 0 |
Results may be incomplete. StatMuse has complete game-level data for pitcher losses going back to the 1901 season.
Some of the information used here was obtained free of charge from Retrosheet.
Cardinals 
