Linebacker Harry Jacobs has only interception statistics. Tackles and sacks weren't recorded. Sacks became an official statistic in 1982.
Hall of Famer Merlin Olsen gets nothing for statistics. He had an interception for a touchdown in 1962.
Paul Warfield was a wide receiver but his looks different than Calvin Hill's. I remember him running reverses but they don't bother listing his rushing statistics since he only had done that four times before 1970.