Has an MLB game ever ended 23-0?

Exactly once. On July 6, 1883, Cincinnati Red Stockings beat Baltimore Orioles 23-0, and no MLB game before or since has ended that way. When it happened it was a scorigami, the first 23-0 in league history.

Where 23-0 sits among nearby MLB scores. Deeper blue means a score has happened more often; the outlined cell is the new one.

That makes 23-0 the 278th most common final score out of 330 that have ever occurred in MLB. One point away, 24-0 has happened 2 times and 23-1 has happened 2 times.

Every 23-0 in MLB history

Date	Result	Season
1883-07-06	Cincinnati Red Stockings over Baltimore Orioles	1883

Open the MLB grid at 23-0