Arizona Cardinals quarterback Kurt Warner will announce his retirement at a news conference Friday, according to a report by David Kaplan of the Tribune and WGN. Citing a source close to the situation, Kaplan reports that the 38-year-old quarterback will call it a career despite having led the Cardinals to the Super Bowl last season and back to the playoffs again this season. He ended this season on a losing note against the New Orleans Saints. Kurt Warner did miss some playing time this season due to a concussion. He is a sure lock for the NFL Hall of Fame. Thanks for the memories Kurt!