METAIRIE, LA - MAY 17:  Head coach Sean Payton (L) announces that former Tulane football player Devon Walker has been signed to a free agent contract following the New Orleans Saints rookie minicamp at the Saints training facility on May 17, 2014 in Metairie, Louisiana.  Devon Walker was paralyzed from the neck down in 2012 during a game against Tulsa.  (Photo by Stacy Revere/Getty Images)