When a fictional commander would learn the name Samuel B. Roberts

When would MOK learn that the Federation ship which defeated the Rotheran before his takeover was named Samuel B. Roberts?

Only if he deliberately investigated the opponent, although his interest in accurate songs and reputation makes that research plausible.

The fictional commander would need to investigate the earlier opponent to discover the name Samuel B. Roberts. His concern for songs about his victories makes that research plausible, and he may already have done it. Disliking paperwork would not necessarily prevent research that enhanced his reputation. The exchange concerns a fictional Federation vessel, without establishing its franchise or exact designation.