Hank Leiber pinch-hits for the Giants, his first appearance since early May, following his hospitalization as a result of a Bob Feller beaning in spring training.

On August 1, 1937 — Hank Leiber pinch-hits for the Giants, his first appearance since early May, following his hospitalization as a result of a Bob Feller beaning in spring training.

Source:
Baseball Reference August 1
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game