The name Chris Cavanaugh has appeared on various props throughout the seasons. However, Chris is a real life crew member who is a digital image technician. He is not a character on the show.
His last name suggests a connection to character Toby Cavanaugh, but it is simply a coincidence. Chris Cavanaugh is a real life crew member on the set. His name appears on props, similarily to Chris Vail, Marlene King or Mandi Line.