On July 31, 1972 — Royals OF Amos Otis scores the game’s only run, swiping home in the 4th inning with a surprised John Mayberry at bat. Otis reached 3B when Angels pitcher Nolan Ryan makes two of his three errors trying to pick his former teammate off base. This is only the second time in the post-war years that a steal of home accounts for a game’s only run.

Source:
Baseball Reference July 29
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game