January 31, 2017 8:00 pm DeSoto's Grosvenor Prepares For National Signing Day Many high school athletes have waited for this moment. DeSoto’s Tameir Grosvenor is preparing for hers for National Signing Day. NBC 5’s Mercedes Owens has the story. Wake Up to Something Good 0:58 Mystik Dan wins 150th Kentucky Derby in photo finish 2:13 Caitlin Clark makes WNBA debut in Arlington 1:04 Dallas sports fan ‘down under' 0:45 Knicks defeat 76ers, advance to Eastern Conference second round 0:58 Dallas Stars fans ‘down under'