1988 – The Boston Red Sox win their 23rd consecutive home game, breaking the American League record set by the 1931 Philadelphia Athletics.

On August 12, 1988 — 1988 – The Boston Red Sox win their 23rd consecutive home game, breaking the American League record set by the 1931 Philadelphia Athletics.

Source:
Baseball Reference August 12
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game