1954 – In a throwing contest between Jimmy Piersall and Willie Mays before a Red Sox-Giants charity game in Boston, Piersall hurts his arm. He starts the game but leaves midway. He wakes up the following morning with a sore arm that stays with him a year, and he will never throw quite as well again.

On August 16, 1954 — 1954 – In a throwing contest between Jimmy Piersall and Willie Mays before a Red Sox-Giants charity game in Boston, Piersall hurts his arm. He starts the game but leaves midway. He wakes up the following morning with a sore arm that stays with him a year, and he will never throw quite as well again.

Source:
Baseball Reference August 16
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game