August 9. 1967
20 innings played in five hours and 40 minutes of game time. The Twins had a 7-0 lead over the Washington Senators after six innings of play. WIth two on and two out in the top of the seventh, Tim Cullen singled off of Dave Boswell to knock in two runs and break the ice for Washington. Four batters and two pitchers later, Frank Howard hit a three-run home run that tied the game and capped a seven-run inning for the visitors.
The next run in the game did not come until Ken McMullen homered to lead off the 20th inning. The Senators added another on a sacrifice fly and went on to win the marathon at Metropolitan Stadium 9-7.