A descendant of Hambletonian 10, he is considered one of the most important sires in the development of the modern Standardbred breed.
[2] McKinney created a bloodline in the making of the American Standardbred through the Hambletonian 10 offspring George Wilkes.
McKinney was bred by H. H. Wilson, Abdallah Park, Lexington, Kentucky.
Tail-female pedigree: Rosa Sprague by Governor Sprague - Rose Kenney by Mambrino Messenger - Dame by Mambrino Chief - Dam by Napoleon - Dam by Jenkin's Potomac.
The blood of McKinney kept a toehold in Sweden through the sire King Bunter,[3] who got nearly 600 offsprings.