Pot-8-Os was a chestnut colt bred by Willoughby Bertie, 4th Earl of Abingdon, in 1773. He was sired by Eclipse, his dam Sportsmistress traced to Thwaites' Dun Mare from the number 38 family and she was sired by Warren's Sportsman. He was the first foal of Sportsmistress, who also produced the Epsom Derby winner Sir Thomas and the winners Jocundo, Roscius and Sulky.
Pot-8-Os acquired the strange spelling of his nickname through a transliteration error, when a stable lad was asked to write the original name, "Potatoes", on a feed bin. The lad's version, Potoooooooo, was said to amuse his lordship so he kept it, and it appears in the General Stud Book.
He was a horse of quality and endurance, with many of his races being run over the Beacon Course, upwards of four miles. Pot-8-Os won thirty-four races over the span of seven years, including the Jockey Club Purse three times, and the Craven Stakes. In 1778 he was sold to Richard, 1st Earl Grosvenor, for 1,500 guineas (about £100,000 in 2014), plus an agreed percentage of Pot-8-Os' future winnings. …show more content…
A great success in the stud, he sired 172 winners of £61,971 and three cups. His offspring included Champion, the first horse to win both the Derby and the St. Leger Stakes (in 1800); Waxy, who won the Derby Stakes in 1793 and ten other races (and later became the sire line's principal progenitor). Others were Asparagus (1787); Tyrant (1799, Derby winner); Parasol, who won many races and was a dam of Classic winners; and Mandane, dam of Manuella (1812 Oaks