On August 10, 1934 — 1934 – Babe Ruth announces 1934 is definitely his final season as a regular player. He says he will seek a managerial role and will pinch-hit, but will then go back on his decision to play with the Boston Braves in 1935.

Source:
Baseball Reference August 10
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game