Could you explain a little more about the situation you are asking about? The incubation period is the time from acquiring the infection until symptoms appear, and it doesn't sound like that is what you are asking for.
What was the age and condition of the patient? Any other medical conditions?
I am so sorry for your loss, and the horrifying way it happened. Certainly the walking pneumonia could have weakened his immunity and all the work and stress of moving didn't help. The doctor had no way of diagnosing a staph infection in the office. It takes a culture of sputum and some hours to grow it out once it reaches the lab. If pneumonia had been diagnosed based on a chest xray instead of muscle spasm and he had been hospitalized immediately, we can only guess. There is a particularly nasty staph aureus in some areas right now that produces a toxin called Panton-Valentine leukocidin that can be deadly in a day or two in people who are immunocompromised. It seems to favor relatively young people over the very elderly, and is about 75% fatal. Here is some information on it. Again, please accept my condolences.