Saints rookie minicamp notes and observations: Tyler Shough makes strong first impression  NewOrleans.FootballSaints kick off QB competition as Carr retires  ESPNNew Orleans Saints quarterback Derek Carr announces retirement  WDSUSaints’ remaining QBs are Tyler Shough, Spencer Rattler, Jake Haener  NBC SportsSaints rookie minicamp observations: Notes on Tyler Shough, Kelvin Banks and Quincy Riley  NOLA.com