Joe Sprinz fractures his upper jaw in twelve places and has five teeth knocked out attempting to catch a ball dropped 800 feet from a Goodyear blimp. ‘Mule,’ a catcher with the PCL’s San Francisco Seals, had been participating in Baseball Day at the Golden Gate Exposition on Treasure Island in San Francisco Bay when the ball hit his upraised glove and was driven into his face, resulting in a two-month stay in the hospital.

This Day In Baseball

On June 3, 1939 — Joe Sprinz fractures his upper jaw in twelve places and has five teeth knocked out attempting to catch a ball dropped 800 feet from a Goodyear blimp. ‘Mule,’ a catcher with the PCL’s San Francisco Seals, had been participating in Baseball Day at the Golden Gate Exposition on Treasure Island in San Francisco Bay when the ball hit his upraised glove and was driven into his face, resulting in a two-month stay in the hospital.

Source
Baseball Reference June 3