 In 2005, The MetroStars signed Tony Meola and traded Walker to the Columbus Crew.With the Crew, Walker won the team's 2005 Defensive Player of the Year and finished second in MLS with a GAA of 1.12.At the end of 2005 season, Walker injured his back and was sidelined until he retired in 2006 due to a chronic, inoperable back injury.