Jack Doyle hits an unusual home run for Baltimore, but Washington defeats the Orioles, 13 – 5. The home run is noteworthy in that the ball rolls to the fence where a ladder had been placed. It rolls up the ladder and disappears over the fence.

On May 10, 1897 — Jack Doyle hits an unusual home run for Baltimore, but Washington defeats the Orioles, 13 – 5. The home run is noteworthy in that the ball rolls to the fence where a ladder had been placed. It rolls up the ladder and disappears over the fence.

Source:
Baseball Reference May 10