Has an Olympic Baseball game ever ended 9-3?
Exactly once. On August 16, 2004, Canada beat Italy 9-3, and no Olympic Baseball game before or since has ended that way. When it happened it was a scorigami, the first 9-3 in league history.
That makes 9-3 the 48th most common final score out of 87 that have ever occurred in Olympic Baseball. One point away, 10-3 has happened 1 times and 9-4 has happened 2 times.