Carr played nine NFL seasons with the Chicago Cardinals, Eagles and Washington Redskins. He was the starting left cornerback on the 1960 title team and had 13 of his 15 career interceptions with the Eagles. Carr also played one season with the Montreal Alouettes of the CFL in 1958.
After he retired, Carr served 24 years as a NFL assistant coach, including two years as the Eagles defensive coordinator from 1970-71. He also coached two years in the USFL as the defensive coordinator for the Denver Gold from 1983-84 and three years in NFL Europe from 1995-97. Carr was part of the defensive coaching staff for the New England Patriots' AFC Championship team in 1985.
He was inducted into the NAIA Hall of Fame in 1962, after a college career at Morris Harvey, which is now the University of Charleston.