At Philadelphia, the Phils win an 18-inning marathon with the Reds when Don Lock hits a two-out RBI single off Darrell Osteen.

This Day In Baseball

On May 21, 1967 — At Philadelphia, the Phils win an 18-inning marathon with the Reds when Don Lock hits a two-out RBI single off Darrell Osteen.

Source:
Baseball Reference May 21