“I wonder if it ever won another race.”
Sham suffered a fracture at the 1973 Belmont Stakes, and was lucky to finish last, survive, and go to stud. Sham still holds the record for the 2nd fastest Kentucky Derby time, 159.4, which was only good enough for second place behind Secretariat. As his Jockey Laffit Pincay Jr. once remarked, Affirmed was the best horse he had ever rode, but if Affirmed had been in the 1973 Kentucky Derby he would have finished third.
He did not get injured in the Belmont. At least, not conclusively.
See post following yours.