Giggs has surpassed Sir Bobby Charlton's record of 758 games and with a 12-month extension to his Old Trafford contract imminent - he is set to further extend his lead.
But he is convinced boy-wonder Rooney can one day take his place in the history books.
"I think there are players here who could do it," said the Welshman. "Wayne Rooney has been here since he was 20 and has the capacity to stay in the team a long, long time.
"Hopefully he and other players will do what I've done and spend their careers at United. It is a special club and it is not easy to stay in the team throughout your career - but it is possible."