There are two overriding theories of how breeders decide on a mating for racing, and possible future breeding success: Paper Pedigree Analysis and Physical Analysis.
Examining a widely held hypothesis that Belmont Stakes (gr. I) winners are not taken as seriously as potential commercial stallions as winners of the Kentucky Derby (gr. I) or Preakness Stakes (gr. I), or both.
The legacy of El Prado, who has emerged as a serious sire-line contender through two sons whose race records and stud accomplishments could not be more diverse.
This year marks the 50th anniversary of the Triple Crown series of 1966 when one horse almost swept the prize, but another horse who never ran in any of those races was named champion 3-year-old male.
Examining the family of Red Sunset for a look at why Thoroughbred families die.
When compared with all the other stallions that retired in 2011, Kantharos came out on top on our weighted average projections.
Judging by how they looked at Gulfstream and Ocala, the seven by Hansen left little doubt that he will help establish Tapit as an emerging sire-of-sires.
We have a unique opportunity to examine both the completely opposite pedigree patterns and remarkably similar biomechanical structures of three leading classics candidates.
Unbridled was the product of a rather atypical son of Mr. Prospector in Fappiano, whose size and length and driving power came from his broodmare sire, Dr. Fager.
Six stallions that are male-line descendants of A.P. Indy are represented in the upcoming Fasig-Tipton Florida juvenile sale.
When Rock Sand swept the English Triple Crown series in 1903, many thought him lucky not to have faced Zinfandel.
The unpredictable nature of this business is illustrated by Colonel John, a top-class runner whose fee dropped to $7,500 for 2016 and suddenly has a pair of colts on the Derby Trail.
Almahmoud, a fairly successful producer in her own lifetime, has become one of the great influences on the modern Thoroughbred.
Looking back to the weekend of Nov. 21-22, when no less than five sons of Giant's Causeway were represented by stakes winners in North America.
In spite of his tremendous accomplishments as a racehorse, Affirmed went to stud in 1980 with modest expectations compared to those being heaped on American Pharoah.
William 'Scott Billy' Buford, left a significant legacy through the sisters Idlewild and Aerolite.
Scat Daddy, a son of Johannesburg, and a great-grandson of Storm Cat, was represented by his seventh and eighth Northern Hemisphere 2-year-old stakes winners of 2015 in Surfside Tiara and Get Jets.
Blitey was as well-bred as a mare could be and still have a rather offbeat pedigree.
Four-time group I winner Al Kazeem will stand for £12,000 (US$18,280) for the 2016 season after proving subfertile when initially retired. The 7-year-old will enter stud at owner/breeder John Deer's Oakgrove Stud.
For the third year in a row, Gainesway's Tapit leads all North American sires by Comparable Index (CI) of mares bred.
Soaring's daughters as a group were speedy mares. When put to staying sires, however, they imparted a dash of quality speed, putting a finishing touch on Darby Dan's legacy of classic stamina.
Leading turf sire Kitten's Joy will stand for a fee of $100,000 for the third straight year in 2016, Ramsey Farm announced Nov. 5.
English Channel tops the Calumet roster at $25,000, followed by Oxbow ($17,500) and Red Rocks ($12,500).
Empire Maker has returned to what appears somewhat of a transitional time in the U.S. stallion colony.
Frosted is a son of Tapit, the first sire from the Seattle Slew line to benefit consistently from inbreeding to Seattle Slew.
Bloodroot's title as the inaugural Kentucky Broodmare of the Year added one of the last of many laurels to the career of her breeder Edward Riley Bradley, who died in August 1946.
Sired by half brothers and out of full sisters, Ah Day and Ben's Cat share three of their four grandparents, and the differences between them may have a lot to do with that quarter they don't share.
Topped by a $170,000 colt by first-crop sire The Factor, the Keeneland September yearling sale's 11th session posted gains as the auction continued to stay in positive territory overall.
Super Saver represents the male line of 1969 Kentucky Derby and Preakness Stakes winner Majestic Prince, a branch of the Raise a Native sire line that has been overshadowed by the much more numerous Mr. Prospector tribe.
Keeneland's September yearling sale wrapped up its one-day Book 5 session Sept. 24 in Lexington with similar figures to last year's Book 5, and overall figures are still rolling ahead of last year's returns.
As well as brilliance, Beholder has also showed rare versatility, scoring at 5 1/2, six, eight, 8 1/2, nine, and 10 furlongs.
Juvenile racing has held a controversial place in American racing since the late 1800s.
Caro stands at the head of an American sire line being kept alive by his great-great-grandson Uncle Mo, the current leader of the freshman and 2-year-old sire lists.
30 years after Tasso became the first grade I winner sired by a son of Mr. Prospector, another son of Mr. Prospector, Smart Strike, is emerging as a sire of sires.
Spinaway's family continues to produce runners of the highest class, so the race that carries her name at Saratoga is a wonderful way to keep her memory alive.
Busanda is remembered as the dam of 1966 Horse of the Year Buckpasser, a four-time champion broodmare sire whose name is a familiar presence in pedigrees.
Discussion of inbreeding tends to become particularly animated when a really dominant stallion begins to be duplicated in pedigrees.
A son of the brilliant Italian champion Nearco, Nasrullah was one of a cluster of important sires from his immediate family.
Blushing Groom's influence is in the pedigrees of five recent graded stakes winners.
Just a week after the completion of an epochal Triple Crown series, the Stephen Foster threw up a new star in Noble Bird.
Olympia entered stud in 1951 at Danada Farm in Kentucky and proved a prolific sire, getting 40 stakes winners (12%) until his retirement in 1967. His progeny tended to have ample speed like himself.
Triple Crown winner War Admiral's name appears eight times in American Pharoah's pedigree.
Looking at his pedigree, it's not too surprising that Solow's connections -- trainer Freddy Head and owner/breeders Wertheimer et Frere -- would have expected Solow to require a test of stamina.
When Tom Bowling was a foal in 1870, a visitor remarked the colt would never stay a mile. Brilliant, quirky, and downright dangerous, he grew into one of the greatest runners ever bred in America.
The obvious question is whether American Pharoah, a colt gifted with excellent speed, has the stamina to master the "Test of the Champion," the 12-furlong Belmont Stakes (gr. I).
Lovely Maria does have some of that old-fashioned classic stamina on her dam's side, as she's out of Thundercup, an unraced daughter of the Kentucky Derby (gr. I) and Belmont Stakes (gr. I) winner Thunder Gulch.
The second weekend in April saw a career high for veteran sire Exchange Rate, as his daughters Ball Dancing and Miss Ella both won graded stakes.
In America, Glencoe was the leading sire eight times between 1847 and 1858. His best runners included the champions Peytona, Charmer, and Reel, all great fillies, winning at upward of four-mile heats.
Line of David is off to a promising start to his stud career -- he is near the top of the 2015 second-crop sire list. So far he has been represented by two stakes winners: Firing Line and Cross the Line.
Group III-placed at 3 in France and stakes-placed at 4 in the United States, Pompoes went on to become a successful broodmare and a reminder that class can emerge from unlikely places.
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