He was eventually invited to training camp and impressed legendary coach Eddie Robinson, who arranged to meet with his mother about granting Walls a scholarship.
He received a full ride and did not disappoint, earning Division I-AA All-American honors while leading the nation with 11 interceptions his senior year.
Surrounded by a strong defensive unit, which included players like Randy White and Ed "Too Tall" Jones, Walls continued his outstanding play and again led the league in interceptions in 1985 with 9.
During this period of time however, the Cowboys were unable to win a Super Bowl, as they lost the NFC title game in 1981 and 1982 and fell short again in 1983 and 1985.
Despite this, Walls remained one of the most feared cover cornerbacks in the league; eventually, quarterbacks were forced to stop throwing the ball to his side.
[9] It was here that Walls would record his first and only career defensive touchdown, a game-clinching interception return against the Washington Redskins to get the Giants to 7–0 on the season.
With a late field goal, the Giants were able to pull off the upset, 15–13, to advance to Super Bowl XXV, where they met the AFC champion Buffalo Bills.
Walls was on the Sports Illustrated cover photo as he was captured with his arms raised in victory after the Giants won the game.
[10] On October 23, 1992, Walls signed with the Cleveland Browns as a free agent, reuniting with head coach and former Giants defensive coordinator Belichick.
A photograph of the catch, taken by Walter Iooss, with Clark at the height of his leap and Walls reaching out to try to block the ball, was featured on the cover of Sports Illustrated following the game, in which the 49ers defeated the Cowboys 28–27.
Nearly ten years later, Walls would again be featured on the cover of Sports Illustrated, but this time as a winner, celebrating the Giants Super Bowl XXV win over the Buffalo Bills (Feb 4, 1991).
[20] In 2009, he wrote the book A Gift For Ron, detailing his experiences on and off the field including the decision to make the organ donation to Springs.