Jockey Javier Castellano was unseated following the conclusion of the ninth race at Aqueduct Racetrack Nov. 13 and was taken for tests to North Shore University Hospital in Manhasset, N.Y.
Castellano, 33, the leading rider on the New York Racing Association circuit with 220 victories this year, was dropped when his mount, Atlantic Dream, stumbled and fell after finishing last in the 1 1/16-mile maiden race. Castellano was transported to First Aid and then taken to the hospital complaining of pain in his chest.
Atlantic Dreams did not appear to be seriously injured and left the track.
A native of Venezuela, Castellano leads the nation in terms of both victories (317) and purses earned ($25.5 million) this season. He won with six of seven mounts Nov. 9 at Aqueduct.