Horses are brought to the track for the morning workout at Pimlico Race Course in Baltimore, Maryland.
Social Inclusion finished third in the Wood Memorial in his most recent race. He arrived from Florida by van Thursday. His 85-year-old trainer, Manny Azpurua, was on hand to greet the colt. Social Inclusion is to gallop Friday.
California Chrome went for a 1 ½-mile gallop at Churchill Downs on Thursday and is expected to fly to Baltimore on Monday.
A maximum of 14 horses can start in the 1 3/16-mile race May 17, but it appears California Chrome won't face that many challengers.
Ride On Curlin is the only other Derby horse who will try the Preakness. He finished seventh last weekend. Others under consideration include Pablo Del Monte, Kid Cruz, Bayern, Dynamic Impact, Ring Weekend and filly Ria Antonio.