The final game of the (1873) season for the still champion Empires was with the Rowenas on November 9, who defeated the former in a score of 12 to 7. It was a reckless and carelessly played game with nothing in it for the Empires to win or loss and but a portion of the regular nine participated in it. Andy Blong Umpired the game and he and the scorers all say that there was not a single earned run in the whole game.-E.H. Tobias, writing in The Sporting News, January 18, 1896
That's a bit odd. Eighteen runs scored in a game and all of them were unearned. I can honestly say that I've never seen anything like that in all my years of watching baseball. Certainly, the number of unearned runs scored in a 19th century baseball game was very high due to the lack of gloves and large number of errors but to have a game played where not one single earned run was scored must have been exceedingly rare. It was certainly unique enough for Tobias to mention it.