Legal Challenge Lodged Against US Stallion Cap

Tara Madgwick - Tuesday February 23

North American breeding news is highlighted today with news of a legal challenge lodged by three of the world’s biggest studs against The Jockey Club's new rule to restrict thoroughbred stallions foaled from 2020 onwards covering more than 140 mares each year.

The complaint against the “stallion cap”, was filed in the U.S. District Court Eastern District of Kentucky, Central Division in Lexington, names The Jockey Club, Kentucky Horse Racing Commission chairman Jonathan Rabinowitz, and KHRC executive director Marc Guilfoil as defendants.

The suit has been brought by Spendthrift Farm, Ashford Stud (Coolmore US) and Three Chimneys Farm, and argues KHRC has unlawfully delegated power to The Jockey Club, and that the new rule breaches the constitutions of Kentucky and the United States as well as federal and state antitrust laws.

Read the full story at US Bloodhorse.

Last year in the US 42 stallions covered 140 or more mares with the Top 10 listed below.


Uncle Mo was the busiest sire in North America in 2020 covering 257 mares.

Uncle Mo (Ashford) 257
Into Mischief (Spendthrift ) 248
Mendelssohn (Ashford) 242
Vino Rosso (Spendthrift) 238
Constitution (WinStar) 231
Mitole (Spendthrift) 230
Justify (Ashford) 222
Audible (WinStar) 219
Omaha Beach (Spendthrift) 215
Munnings (Ashford) 207.


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