On May 29, 1895 — The Boston Herald box score credits Jake Beckley with a three-run homer to give Pittsburgh an 8 – 6 win over Washington. Under the rules of the era‚ which do not allow a team batting in the bottom of the last inning to win by more than one run‚ Beckley should be credited only with a triple, making the score 7 – 6. Apparently the rule is not strictly enforced.

Source:
Baseball Reference May 29