Prime didn't say anything about him? Instead of being slightly insulted by it, Rodimus just sees this as an opportunity. "Well tell him hello from me if you see him before I do. That'll get him talking."

To that he shrugs. "He's the one that recruited me to the Autobots way at the beginning. And, uh, gave me my name and all that."

Rodimus just assumes he's on casual friendships with most people he runs into. It's a problem.