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Baseball rules/scoring question
It's the bottom of the 9th. Bases are loaded, and the home team's cleanup batter hits a home run. What is the final score? Does the game end immediately at 1-0 when the first runner crosses the plate, or is it 4-0 with all runners allowed to score?
This explains it well: https://en.wikipedia.org/wiki/Walk-off_home_run#Relevant_rules
Officially under current MLB rules, all the runs score. This is to prevent what's referenced in that article, namely a player not being awarded an official home run on the scoring (thus causing his stats to be inaccurate, and baseball is all about stats), and instead it only being scored as a hit.
All the runners score and the game ends 4-0, unless one of the runners passes another runner on the bases, or one of them fails to round the bases and touch home plate. A famous example of the latter is the grand slam single from the 1999 playoffs, when Robin Ventura hit a grand slam to win the game but was mobbed by his teammates between first and second base. The home run was officially ruled a single and only one run counted.
I'm pretty sure all the runners are allowed to score.