Minnesota’s 20-inning, 9 – 7 loss to the Senators is the longest game in Twins history. Ken McMullen’s 20th-inning home run wins it for Washington.

This Day In Baseball

On August 9, 1967 — Minnesota’s 20-inning, 9 – 7 loss to the Senators is the longest game in Twins history. Ken McMullen’s 20th-inning home run wins it for Washington.

Source:
Baseball Reference August 9
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game