Godolphin's Good Cheer (Medaglia d'Oro), the likely favorite for the GI Longines Kentucky Oaks, turned in her most serious work to date Thursday morning at Churchill Downs with a five-furlong breeze in a sharp :59.40, the fastest of 10 at the distance. The undefeated filly hit the track at 7:15 a.m. EST wearing her usual set of blinkers and partnered with trainer Brad Cox's longtime exercise rider Edvin Vargas. She began her workout at the 4 1/2-furlong pole and broke off about two lengths behind stablemate and maiden Saucier (City...