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Mac Diarmida

Mac Diarmida (1975–2005) was an American Thoroughbred Champion racehorse.

Mac Diarmida was bred by John Hartigan at his Cashel Stud farm in Ocala, Florida. Sired by Minnesota Mac, he was out of the mare Flying Tammie, a daughter of the 1958 Kentucky Derby and Preakness Stakes winner, Tim Tam.

As a weanling, John Hartigan sold Mac Diarmida in a private transaction to Dr. Jerome Torsney, who entrusted his race conditioning to future U.S. Racing Hall of Fame inductee Scotty Schulhofer.

Mac Diarmida made two starts at age two without a win. However, at age three he had a Championship year, winning twelve of his fourteen starts including ten in a row on grass surfaces. Ridden by Jean Cruguet, among Mac Diarmida's 1978 wins, he beat older horses in capturing the two most important North American turf races with European competitors: the Canadian International ChampionshipatWoodbine RacetrackinToronto, Ontario, Canada and the Washington, D.C. InternationalatLaurel Park RacecourseinLaurel, Maryland. Mac Diarmida was voted the 1978 Eclipse Award for American Champion Male Turf Horse.

Wintered in Florida, Mac Diarmida was being readied to race as a four-year-old when he injured himself and had to be retired from racing.

He was sent to stand at stud at Cashel Stud in Ocala, Florida where he had been born. There, he served as a stallion for thirteen seasons before being pensioned. He was the sire of seventy-three winners, including four stakes winners.

Due to the infirmities of old age, on September 8, 2005, the thirty-year-old Mac Diarmida was humanely euthanized. He is buried in the Cashel Farm's equine cemetery.

• Mac Diarmida's pedigree and partial racing stats
• Video at YouTube of Mac Diarmida winning the 1978 Washington, D.C. International Stakes
• Mac Diarmida's obituary at Thoroughbred Times