Has an Olympic Baseball game ever ended 13-5?
Exactly once. On September 18, 2000, Cuba beat Italy 13-5, and no Olympic Baseball game before or since has ended that way. When it happened it was a scorigami, the first 13-5 in league history.
That makes 13-5 the 48th most common final score out of 87 that have ever occurred in Olympic Baseball. One point away, 14-5 has happened never and 13-6 has happened 1 times.