(AP Photo/Gregory Payan, File)Jockeys riding in the rescheduled 146th Kentucky Derby have to arrive by Monday and then quarantine upon returning to their home tracks, just one of many changes forced by the coronavirus pandemic. Initially, Churchill Downs had proposed an arrival date of Aug. 24 -- nearly two weeks before the Derby on Sept. 5. Smith will bolster his trip to the Derby with a riding assignment the following weekend at Kentucky Downs near the Tennessee border. Smith will be joined by some other Derby jockeys. Their coronavirus tests from Churchill Downs will be honored at the southern Kentucky track.