Curis is a former professional American football player for the Baltimore Colts, the Seattle Seahawks and the Washington Redskins, who played 14 seasons from 1965 to 1978 in the National Football League. He was a four-time Pro Bowler in 1968, 1970, 1971 and 1974. He was considered one of the meanest players of his era.

Although sacks were not official during the time he played, Curtis was a good blitzer, recording 22 sacks, including one in which a famous photograph was taken of Curtis tackling Roman Gabriel’s head. Curtis also picked off 25 passes and was named the AFC Defensive Player of the Year in 1970 by a panel of 101 sportswriters.