Richard Marvin Butkus (December 9, 1942 - October 5, 2023) was an American former professional football player, sports commentator, and actor. He played football as a middle linebacker for the Chicago Bears of the National Football League (NFL) from 1965 to 1973. He was invited to eight Pro Bowls, named a first-team All-Pro six times, and was twice recognized by his peers as the NFL's Defensive Player of the Year. He was renowned as a fierce tackler and for the relentless effort with which he played and is widely regarded as one of the greatest and most intimidating linebackers in pro football history.