Bargain Day, who was born when Kelso was racing, died the night of June 24 at Marilyn Rose's Van Mar Farm near Galt, Calif.
"It was apparently an easy death as there was no signs of any struggle," Rose said. "I am so glad he could go this way and that I didn't have to put him down."
Bargain Day had called Van Mar home since 1972. He sired 24 stakes winners, including Hoedown's Day, who set a world-record mark of 1:38 2/5 for 1 1/16 miles on dirt in a stakes win at Bay Meadows.
Bargain Day (Prove It--Special Price, by Toulouse Lautrec) raced for his breeder, Rex Ellsworth, before Buddy Fogelson bought him for his Forked Lightning Ranch in 1969. Bargain Day entered stud with a record of 13 wins from 43 starts and earnings of $146,575.