The Elmira Pioneers beat the Springfield Giants, 2 – 1, in 27 innings, a new record (since broken) for Organized Baseball’s longest game. The attendance is 386 fans. Fred Beene picks up the win, pitching the last 12 innings. The game is scoreless for 25 innings, with both teams scoring in the 26th; finally, Elmira, managed by Earl Weaver, breaks through in the 27th.

On May 8, 1965 — The Elmira Pioneers beat the Springfield Giants, 2 – 1, in 27 innings, a new record (since broken) for Organized Baseball’s longest game. The attendance is 386 fans. Fred Beene picks up the win, pitching the last 12 innings. The game is scoreless for 25 innings, with both teams scoring in the 26th; finally, Elmira, managed by Earl Weaver, breaks through in the 27th.

Source:
Baseball Reference May 8