50 pitchers are tied for losing the most games in a game, with 1 game. The first three are Frankie Montas Jr., Connor Brogdon and Jalen Beeks yesterday.
Interpreted as:
biggest loss by a player in a regular-season game in MLB history| 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 |  | F. Montas Jr. | 1 | 6/29/2025 |  NYM | @ |  PIT | L | 0 | 1.000 | 1 | 13.50 | 5 | 0 | 0 | 0 | 4.0 | 7 | 6 | 6 | 2 | 1 | 0 | 0 | 0 | 20 | 0 |
| 2 | | C. Brogdon | 1 | 6/29/2025 |  LAA | vs |  WSH | L | 0 | 1.000 | 0 | 9.00 | 0 | 0 | 0 | 0 | 2.0 | 3 | 2 | 3 | 0 | 2 | 0 | 1 | 2 | 10 | 0 |
| 3 | | J. Beeks | 1 | 6/29/2025 |  AZ | vs |  MIA | L | 0 | 1.000 | 0 | 67.50 | 2 | 0 | 0 | 0 | 0.2 | 2 | 5 | 5 | 0 | 4 | 0 | 0 | 1 | 8 | 0 |
| 4 | | C. Paddack | 1 | 6/29/2025 |  MIN | @ |  DET | L | 0 | 1.000 | 1 | 5.79 | 3 | 0 | 0 | 0 | 4.2 | 6 | 3 | 3 | 2 | 0 | 1 | 0 | 0 | 21 | 0 |
| 5 |  | S. Strider | 1 | 6/29/2025 |  ATL | vs |  PHI | L | 0 | 1.000 | 1 | 2.57 | 4 | 0 | 0 | 0 | 7.0 | 5 | 2 | 2 | 0 | 3 | 0 | 0 | 0 | 28 | 0 |
| 6 | | J. Taillon | 1 | 6/29/2025 |  CHC | @ |  HOU | L | 0 | 1.000 | 1 | 3.86 | 4 | 0 | 0 | 0 | 4.2 | 5 | 2 | 2 | 1 | 1 | 0 | 0 | 0 | 21 | 0 |
| 7 | | K. Bubic | 1 | 6/29/2025 |  KCR | vs |  LAD | L | 0 | 1.000 | 1 | 3.60 | 5 | 0 | 0 | 0 | 5.0 | 3 | 2 | 2 | 1 | 2 | 0 | 0 | 0 | 19 | 0 |
| 8 | | T. Bradley | 1 | 6/29/2025 |  TBR | @ |  BAL | L | 0 | 1.000 | 1 | 8.44 | 2 | 0 | 0 | 0 | 5.1 | 8 | 5 | 5 | 0 | 1 | 0 | 0 | 0 | 24 | 2 |
| 9 |  | R. Suarez | 1 | 6/29/2025 |  SDP | @ |  CIN | L | 0 | 1.000 | 0 | 54.00 | 0 | 0 | 0 | 0 | 0.1 | 4 | 2 | 2 | 0 | 1 | 0 | 1 | 0 | 6 | 0 |
| 10 |  | L. Severino | 1 | 6/29/2025 |  ATH | @ |  NYY | L | 0 | 1.000 | 1 | 14.73 | 3 | 0 | 0 | 0 | 3.2 | 5 | 6 | 7 | 2 | 3 | 2 | 0 | 0 | 22 | 2 |
| 11 |  | W. Buehler | 1 | 6/29/2025 |  BOS | vs |  TOR | L | 0 | 1.000 | 1 | 9.00 | 3 | 0 | 0 | 0 | 4.0 | 4 | 4 | 4 | 2 | 3 | 0 | 0 | 0 | 18 | 0 |
| 12 | | E. Miller | 1 | 6/29/2025 |  SFG | @ |  CWS | L | 0 | 1.000 | 0 | 27.00 | 0 | 0 | 0 | 0 | 0.2 | 2 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 4 | 0 |
| 13 | | C. Winn | 1 | 6/29/2025 |  TEX | vs |  SEA | L | 0 | 1.000 | 0 | 9.00 | 0 | 0 | 0 | 0 | 2.0 | 2 | 2 | 3 | 1 | 1 | 0 | 1 | 1 | 9 | 0 |
| 14 | | L. Allen | 1 | 6/29/2025 |  CLE | vs |  STL | L | 0 | 1.000 | 1 | 4.50 | 6 | 0 | 0 | 0 | 6.0 | 6 | 3 | 3 | 1 | 2 | 0 | 0 | 0 | 24 | 0 |
| 15 | | G. Anderson | 1 | 6/29/2025 |  MIL | vs |  COL | L | 0 | 1.000 | 0 | 0.00 | 2 | 0 | 0 | 0 | 1.0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 3 | 0 |
| 16 | | L. McCullers Jr. | 1 | 6/28/2025 | HOU | vs | CHC | L | 0 | 1.000 | 1 | 21.60 | 1 | 0 | 0 | 0 | 3.1 | 7 | 8 | 8 | 3 | 4 | 0 | 0 | 0 | 21 | 0 |
| 17 | | C. Schmidt | 1 | 6/28/2025 | NYY | vs | ATH | L | 0 | 1.000 | 1 | 6.00 | 7 | 0 | 0 | 0 | 6.0 | 4 | 4 | 4 | 2 | 2 | 0 | 0 | 0 | 24 | 0 |
| 18 | | A. Senzatela | 1 | 6/28/2025 | COL | @ | MIL | L | 0 | 1.000 | 1 | 10.38 | 2 | 0 | 0 | 0 | 4.1 | 8 | 5 | 5 | 1 | 3 | 1 | 0 | 0 | 25 | 0 |
| 19 | | B. Casparius | 1 | 6/28/2025 | LAD | @ | KCR | L | 0 | 1.000 | 0 | 13.50 | 4 | 0 | 0 | 0 | 4.0 | 8 | 6 | 6 | 1 | 1 | 0 | 0 | 0 | 20 | 0 |
| 20 | | P. Blackburn | 1 | 6/28/2025 | NYM | @ | PIT | L | 0 | 1.000 | 1 | 27.00 | 2 | 0 | 0 | 0 | 1.0 | 6 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 9 | 0 |
| 21 | | Z. Brzykcy | 1 | 6/28/2025 | WSH | @ | LAA | L | 0 | 1.000 | 0 | 0 | 0 | 0 | 0 | 0.0 | 3 | 3 | 3 | 1 | 0 | 0 | 0 | 0 | 3 | 0 | |
| 22 | | J. Luzardo | 1 | 6/28/2025 | PHI | @ | ATL | L | 0 | 1.000 | 1 | 3.60 | 7 | 0 | 0 | 0 | 5.0 | 7 | 2 | 2 | 0 | 3 | 0 | 0 | 0 | 23 | 0 |
| 23 | | Z. Eflin | 1 | 6/28/2025 | BAL | vs | TBR | L | 0 | 1.000 | 1 | 36.00 | 0 | 0 | 0 | 0 | 1.0 | 5 | 4 | 4 | 1 | 0 | 0 | 0 | 0 | 8 | 0 |
| 24 | | C. Bassitt | 1 | 6/28/2025 | TOR | @ | BOS | L | 0 | 1.000 | 1 | 36.00 | 3 | 0 | 0 | 0 | 2.0 | 8 | 8 | 9 | 1 | 4 | 1 | 0 | 0 | 19 | 0 |
| 25 |  | A. Muñoz | 1 | 6/28/2025 | SEA | @ | TEX | L | 0 | 1.000 | 0 | 0.00 | 1 | 0 | 0 | 0 | 0.1 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 4 | 1 |
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.
