He next played 14 seasons in the National Football League (NFL) as a defensive halfback and safety for the New York Giants (1948–1958) and Green Bay Packers (1959–1961). He was selected as a first-team All-Pro six times and played in nine Pro Bowls. He was a member of NFL championship teams in 1956 and 1961. When he retired as a player, he held NFL career records for interceptions (79), interception return yards (1,282), punt returns (258), and punt return yards (2,209).