Last updated: April 11, 2026
Man o’ War was an American Thoroughbred racehorse who won 20 of his 21 career starts and set seven world speed records across 1919–1920. The Blood-Horse, ESPN, and the Associated Press have all ranked him the greatest American racehorse of the 20th century — a consensus based on career dominance, physical attributes, and unmatched influence on Thoroughbred breeding.
The case rests on four facts:
- 20 wins from 21 career starts — his only loss came from a poor start, not a faster horse
- 7 world speed records set across multiple distances in two racing seasons
- 28-foot stride — the longest ever measured in a Thoroughbred racehorse
- His bloodline is in virtually every modern American Thoroughbred — no other racehorse’s genetic influence comes close
The debate between Man o’ War and Secretariat as the greatest is legitimate and unresolvable — they raced 53 years apart. What isn’t debatable is that Man o’ War dominated his era in a way no other horse in American racing history has matched.
| Career Starts | 21 |
| Wins | 20 |
| Losses | 1 |
| Years Active | 1919–1920 |
| Speed Records Set | 7 |
| Longest Stride | 28 feet |
| Top Weight Carried | 138 lbs |
| Stud Stakes Winners | 62 |
| Horse of the Year | 1920 |
Every time I study a Thoroughbred pedigree — and after 30 years owning and racing horses at Fair Grounds, Delta Downs, and Evangeline Downs, I’ve looked through thousands of them — the Man o’ War racehorse shows up in the background. Not occasionally. Almost always. And in this game, that tells you more about a horse than anything in the record books. Man o’ War proved that better than any horse we’ve ever had.
He was called “Big Red” by the farmhands who raised him — the same nickname Secretariat would earn 50 years later, which tells you something about how rare that tier of horse actually is. Man o’ War came first, and in this game, that matters. He set the bar that every great horse since has been measured against. Here’s the full picture of what he did, why it still counts, and what an honest comparison to Secretariat actually looks like.
Table of Contents
Early Life and Pedigree
Man o’ War was foaled on March 29, 1917, at August Belmont Jr.’s Nursery Stud near Lexington, Kentucky. His sire was Fair Play — the leading sire in North America in 1920, 1924, and 1927 — and his dam was Mahubah, a Cluster Mare who produced multiple offspring capable of winning five or more of the top eight races. The combination of Fair Play’s speed and Mahubah’s race-winning bloodline produced something the breeding world hadn’t seen in a generation.
Belmont’s decision to sell his yearlings in 1918 — the year Man o’ War came up for auction at Saratoga — was driven by his involvement in World War I. While Belmont was serving in France, his wife named the foal Man o’ War in honor of his military service. At the Saratoga yearling sale, Samuel Riddle purchased the chestnut colt for $5,000. Riddle later declined offers reportedly exceeding $300,000 for the horse — a decision that, given what happened next, proved to be one of the most astute refusals in the history of horse ownership.
At Riddle’s farm, the colt grew into a tall, imposing chestnut with straight legs and a presence that made farmhands stop and look. They started calling him “Big Red” — the same nickname Secretariat would earn half a century later, which gives you a sense of how rare that physical impression actually is among Thoroughbreds. His trainer, Louis Feustel, recognized early that he was working with something extraordinary.
Two Dominant Racing Seasons
1919: The Two-Year-Old Season
Man o’ War’s two-year-old campaign in 1919 produced 9 wins from 10 starts — the one blemish being his famous loss to Upset at Saratoga, covered in the next section. His victories included the Hopeful Stakes and the Belmont Futurity, then the most prestigious races for two-year-olds in American racing. He won most of them with something in reserve, which is what made racing observers nervous in the best possible way. You could see he wasn’t being extended.
1920: The Three-Year-Old Season — Unbeaten
In 1920, Man o’ War was undefeated in 11 starts, and the performances moved from dominant to historic. He won the Preakness Stakes, the Belmont Stakes, the Withers Stakes, the Stuyvesant Handicap, the Dwyer Stakes, the Miller Stakes, the Travers Stakes, the Lawrence Realization, the Jockey Club Gold Cup, and the Potomac Handicap. He was named Horse of the Year and was voted the best American racehorse of the 20th century by The Blood-Horse, Sports Illustrated, ESPN, and the Associated Press — a consensus across a century of racing that no other horse has matched.
What stands out in retrospect is not just the wins but the conditions under which he won. In many of his races, handicappers loaded him with extra weight to give the field a chance — routinely carrying 130 pounds or more, with some races requiring up to 138 pounds. He won them anyway, often by multiple lengths. Weight assignments in racing are designed to equalize competition. They couldn’t equalize Man o’ War.
The One Loss: Upset at Saratoga
On August 13, 1919, at Saratoga Race Course, Man o’ War lost by a neck to a colt named Upset. The circumstances deserve examination because the loss is often cited as evidence of vulnerability — which it wasn’t, not really.
The start was a mess. Barrier starts were used at the time rather than starting gates, and Man o’ War was facing the wrong direction when the flag dropped. He was left at the post while the field broke cleanly. He closed the gap through the race but couldn’t overcome the deficit in time. Jockey Johnny Loftus — who was later denied a license renewal, though the reasons were disputed — was widely criticized for his handling of the horse both at the start and during the race.
The horse that beat him, Upset, never beat another horse of significance in his career. He was a good horse. He was not in Man o’ War’s class. The loss was a function of circumstances, not capability — which the 1920 season, with 11 consecutive wins under heavy weights, demonstrated conclusively.
Physical Traits: What Made Big Red Exceptional
Man o’ War’s physical attributes were extraordinary even by the standards of elite Thoroughbreds. Standing over 16 hands and weighing over 1,100 pounds at his peak, he was large for a racehorse of his era. But size alone doesn’t produce what he produced. The specific combination of traits that made him exceptional was more particular than that.
His stride length was measured at 28 feet — the longest ever recorded for a Thoroughbred racehorse. For comparison, Secretariat’s stride was approximately 25 feet, itself considered exceptional. A 28-foot stride means that at full extension, Man o’ War was covering more than nine yards of ground with each complete cycle of his legs. Combined with the stride frequency he was capable of maintaining, this produced ground-covering efficiency that no instrument at the time could fully quantify but that everyone who watched him recognized immediately.
His musculature was described by contemporaries as “perfectly proportioned for power” — a deep chest, powerful hindquarters, and a balance through the back that allowed him to transfer energy from his hindquarters into forward motion with minimal waste. Louis Feustel, his trainer, reportedly said that training Man o’ War was less about developing his ability than about managing it — keeping him focused and preventing him from doing more in training than was good for him.
Seven Speed Records
Man o’ War set world or American speed records in seven races across his two-season career. This is the number most often cited, and it holds up to scrutiny — he wasn’t breaking records in obscure conditions on unusual tracks. He was breaking them in major races against the best fields available, often carrying above-average weight assignments.
| Race | Year | Distance | Time | Weight Carried |
|---|---|---|---|---|
| Belmont Stakes | 1920 | 1½ miles | 2:14.2 | 126 lbs |
| Lawrence Realization | 1920 | 1 mile 5 furlongs | 2:40.4 | 126 lbs |
| Travers Stakes | 1920 | 1¼ miles | 2:01.4 | 129 lbs |
| Dwyer Stakes | 1920 | 1⅛ miles | 1:49.2 | 130 lbs |
| Withers Stakes | 1920 | 1 mile | 1:35.4 | 118 lbs |
| Stuyvesant Handicap | 1920 | 6 furlongs | 1:11.2 | 135 lbs |
| Potomac Handicap | 1920 | 1⅛ miles | 1:44.4 | 138 lbs |
The breadth of this record-setting is more significant than any individual time. He set records from 6 furlongs all the way to a mile and a half — demonstrating that his speed wasn’t distance-specific. He was equally fast over sprint distances and classic distances, and he was doing it under weight assignments that were designed to slow him down. They didn’t.
One important qualifier that honest horsemen acknowledge: timing technology in 1920 was less precise than modern systems. Hand-timing with stop watches was the standard, introducing measurement variability that makes exact era comparison difficult. This doesn’t diminish what Man o’ War achieved — it just means his times can’t be placed alongside a modern Beyer Speed Figure and treated as equivalent data. The records stood for years or decades in several cases, in conditions where other horses were actively trying to break them. That durability is the most meaningful measure.
Why Man o’ War Never Ran the Kentucky Derby
The Kentucky Derby is the most famous American race, and Man o’ War never ran it. This is one of the first questions anyone asks about his career, and the answer is worth understanding in context.
Owner Samuel Riddle had two stated objections. First, he believed ten furlongs — a mile and a quarter — was too demanding a distance for a three-year-old in early May. This was a genuinely held view among some horsemen of the era and not as eccentric as it sounds today. Second, and more practically, Riddle simply did not like racing in Kentucky. He was a Pennsylvania man and preferred the racing circuits of the Northeast.
The historical irony is considerable. The Kentucky Derby in 1920 was won by Paul Jones, a horse Man o’ War had beaten easily in prior meetings. Later in the same season, Man o’ War easily defeated horses that Paul Jones couldn’t have touched. The consensus among racing historians is that Man o’ War would have won the 1920 Derby without being fully extended. But he never ran it, and the record shows a blank where the roses should be.
Man o’ War vs. Secretariat: The Honest Comparison
This is the comparison that never gets resolved and never will — which is exactly what makes it worth examining carefully. In the Secretariat article on this site, I make the case that Secretariat was the fastest horse to ever race at classic distances. The Belmont record of 2:24 flat, standing for over 50 years, is the foundation of that argument. Nothing in this article changes that position. But the comparison between the two horses is more nuanced than a single race time.
| Category | Man o’ War | Secretariat |
|---|---|---|
| Career record | 20–1 (21 starts) | 16–3–1 (21 starts) |
| Speed records set | 7 world/American records | 3 Triple Crown records (all still stand) |
| Stride length | 28 feet (longest ever recorded) | ~25 feet (exceptional) |
| Weight carried | Up to 138 lbs under handicap | Standard weights — no heavy handicaps |
| Kentucky Derby | Did not run (owner’s choice) | Won in 1:59 2/5 (record still stands) |
| Belmont Stakes | Won by 20 lengths | Won by 31 lengths — 2:24 flat (record) |
| Stud success | 62 stakes winners — War Admiral (TC) | Modest as sire — daughters dominant |
| Pedigree influence | Found in virtually every modern TB | Strong through female line |
| Era comparison | Pre-standardized timing (1919–1920) | Modern timing, records verifiable (1973) |
| Timing precision | Hand-timed — era limitation | Electronic timing — directly comparable |
The case for Man o’ War as the greatest, taken on its own terms: he ran more races under harder conditions — heavier weights, uncertain track preparation, and barrier starts rather than starting gates — and won 20 of 21. His competitive record is cleaner than Secretariat’s. His stride length was longer. His stud influence was more pervasive. And he did all of this before the sport had the infrastructure to properly measure what he was doing.
The case for Secretariat, taken on its own terms: his times are verifiable, directly comparable to every horse that ran after him, and they’ve held up for over 50 years of serious competition. His Belmont record by 31 lengths in 2:24 flat is the single greatest timed performance in racing history. American Pharoah, the best Triple Crown winner of the modern era, ran that distance in 2:26.65 — on the same track. That gap is not a rounding error.
Stud Career and Breeding Legacy
Man o’ War retired from racing after the 1920 season and stood at stud at Samuel Riddle’s Faraway Farm near Lexington, Kentucky. Despite being limited to approximately 25 mares per year — the Jockey Club’s rules required live cover rather than artificial insemination, which remains the rule in Thoroughbred breeding today — he produced 62 stakes winners across his stud career. That number, achieved under strict breeding limitations, is remarkable.
His most famous son was War Admiral, who won the 1937 Triple Crown and is best remembered as the horse Seabiscuit defeated in their famous 1938 match race. Man o’ War was the leading sire in North America in 1926 and the runner-up in 1928, 1929, and 1937. The depth of his stud influence is measured not just in stakes winners but in the degree to which his bloodline permeated the breed — virtually every modern American Thoroughbred traces back to Man o’ War through multiple pathways.
His daughter-in-law connection to Seabiscuit deserves specific mention: Seabiscuit’s sire was Hard Tack, who was Man o’ War’s son, making Seabiscuit Man o’ War’s grandson. The 1938 match race between War Admiral and Seabiscuit was, in a meaningful sense, a competition between two branches of the same bloodline — Man o’ War’s legacy running against itself. If you want to understand why Man o’ War’s influence on the breed is considered unmatched, that race is a useful illustration. His blood was on both sides of the most celebrated match race in American history. For the full story of how Man o’ War’s bloodline played out through Seabiscuit’s career, see Seabiscuit: the unlikely champion who captivated Depression-era America.
Death and Enduring Legacy
Man o’ War died on November 1, 1947, at the age of 30 — an exceptional lifespan for a horse. His death was treated as a public event of genuine significance. He was embalmed and buried in an oak casket at Faraway Farm, believed to be the first horse in America accorded a full funeral service. Nine eulogies were delivered. The service was broadcast on radio across the country and lasted approximately 30 minutes. An estimated 2,000 people attended in person.
The National Museum of Racing and Hall of Fame honored his achievements with a special exhibition, “Man o’ War at 100,” marking the centennial of his birth. Multiple sports publications’ all-time rankings consistently place him at or near the top of any list of the greatest American racehorses — The Blood-Horse, ESPN, Sports Illustrated, and the Associated Press all named him the best American racehorse of the 20th century. In a century that included Secretariat, Citation, Seattle Slew, and Affirmed, that consensus means something.
His racing legacy is found in the speed records of every subsequent era, in the pedigrees of horses winning today, and in the standard against which every successive generation of great racehorses is inevitably compared. When people ask whether a modern horse is as good as the greats, the conversation always comes back to Man o’ War eventually.
Watch archival footage of Man o’ War in action — rare film of the horse whose performances defined what American racing could look like:
FAQs About Man o’ War
Was Man o’ War the greatest racehorse of all time?
Man o’ War is widely considered the greatest American racehorse of the 20th century by The Blood-Horse, Sports Illustrated, ESPN, and the Associated Press. His 20-1 career record, 7 speed records, dominant weight-carrying performances, and unparalleled breeding influence collectively make the strongest case. Whether he was greater than Secretariat depends on how you define greatness — career dominance and influence favor Man o’ War; verifiable sustained speed at classic distances favors Secretariat.
How many races did Man o’ War win?
Man o’ War won 20 of 21 career races across two seasons — 9 from 10 as a two-year-old in 1919, and 11 from 11 as a three-year-old in 1920. His only loss came to a colt named Upset at Saratoga in 1919, in a race where Man o’ War was left at the post due to a poor barrier start. He was never beaten by a horse that ran better on the day; the circumstances of that single loss have been debated ever since.
What horse beat Man o’ War?
The only horse to ever beat Man o’ War was a colt named Upset, in the 1919 Sanford Memorial Stakes at Saratoga. Ironically, some racing historians attribute the origin of the term ‘upset’ in sports to this race — though etymologists note the word predates 1919. Upset never beat another horse of comparable quality in his career. The circumstances of Man o’ War’s loss — a bad start from a barrier with his jockey facing the wrong direction — are considered the primary reason for the defeat.
Why didn’t Man o’ War run the Kentucky Derby?
Owner Samuel Riddle chose not to enter Man o’ War in the 1920 Kentucky Derby for two reasons: he believed ten furlongs was too demanding for a three-year-old in early May, and he preferred the racing circuits of the Northeast to Kentucky. The Derby was also less prestigious in 1920 than it is today. Paul Jones, who won the 1920 Derby, had previously been beaten by Man o’ War and would have been no match for him.
What racehorse has the longest stride?
Man o’ War holds the record for the longest measured stride in Thoroughbred racing at 28 feet. Secretariat’s stride was approximately 25 feet, itself considered exceptional. Stride length combined with stride frequency determines speed efficiency — Man o’ War’s 28-foot stride meant he was covering more than nine yards of ground per complete stride cycle, which contributed directly to his ability to win by wide margins even under heavy weight.
Is Man o’ War related to Secretariat?
They are not directly related. Man o’ War’s sire was Fair Play. Secretariat’s sire was Bold Ruler, whose great-grandsire was Fair Play — making Fair Play a common ancestor rather than a direct connection. They are very distantly related through Fair Play’s line, which is present throughout modern Thoroughbred pedigrees. Secretariat is not a descendant of Man o’ War.
Is Man o’ War related to Seabiscuit?
Yes — Seabiscuit was Man o’ War’s grandson. Seabiscuit’s sire was Hard Tack, who was one of Man o’ War’s sons. This made the 1938 match race between War Admiral (Man o’ War’s son) and Seabiscuit (Man o’ War’s grandson) a competition within the same bloodline — two branches of Man o’ War’s legacy racing against each other. War Admiral lost.
Who was Man o’ War’s trainer?
Man o’ War was trained by Louis Feustel throughout his racing career. Feustel reportedly described training Man o’ War as more about managing his energy than developing it — keeping the horse focused and preventing him from doing more in training than was good for him. Feustel recognized early that he was working with an animal whose ability exceeded anything the sport’s conventional training methods were designed for.
Would Man o’ War have beaten Secretariat?
No one can answer this with confidence, and anyone who tells you they can is speculating. They raced 53 years apart on different tracks with different timing technology, different competition fields, and different race conditions. Man o’ War’s 20-1 record under heavy weights is the strongest career dominance argument in American racing history. Secretariat’s Belmont time of 2:24 flat has never been approached. The honest answer is that the comparison is one of racing’s great unresolvable debates — which is precisely why it remains interesting.
Was Man o’ War the Greatest Racehorse Ever?
The question has been debated for over a century and it isn’t going away. Multiple sports publications — The Blood-Horse, ESPN, Sports Illustrated, and the Associated Press — all named Man o’ War the best American racehorse of the 20th century. That’s a century of racing that includes Secretariat, Citation, Seattle Slew, Affirmed, and American Pharoah. The consensus isn’t unanimous, but no other horse has earned it as consistently.
The argument against him is Secretariat’s Belmont record — 2:24 flat, still standing after 50 years — and the fact that Man o’ War’s times were hand-timed on tracks that weren’t prepared to modern standards. Those are legitimate points. The argument for him is everything else: 20-1 under conditions designed to slow him down, 7 speed records across multiple distances, 28 feet of stride, and a breeding legacy that literally built the modern American Thoroughbred. Even elite modern horses like American Pharoah and Justify, who won the Triple Crown without heavy handicap weights, never faced the kind of weight assignments Man o’ War routinely carried and won under.
My answer, after 30 years in racing: the “greatest ever” question depends entirely on your definition. For career dominance, competitive conditions, and lasting genetic influence — Man o’ War. For the single most verifiable timed performance over a classic distance — Secretariat’s full breakdown of speed and records makes the case. Both answers are defensible. Neither is wrong.
The Verdict: Man o’ War’s Place in Racing History
Man o’ War was the most complete racehorse in American history. Twenty wins from 21 starts, seven speed records, the longest stride ever measured, dominance under weight conditions that would have broken other champions, and a breeding legacy that literally shaped the modern Thoroughbred breed. No other American racehorse has produced that combination across a career.
The comparison to Secretariat is real and unresolvable — and both horses are better understood by engaging with it seriously rather than declaring a winner. Man o’ War’s greatness was about the totality of dominance across a career and the depth of what he left behind. Secretariat’s greatness was about verified speed at classic distances that has never been replicated. Both are true simultaneously. They answer different questions about what a racehorse can be.
- 20 wins from 21 starts — the one loss came from a bad barrier start, not a faster horse
- 7 world/American speed records across multiple distances in two seasons
- 28-foot stride — the longest ever measured in a Thoroughbred; Secretariat’s was approximately 25 feet
- Carried up to 138 pounds under handicap and won anyway — weight assignments couldn’t equalize him
- Never ran the Kentucky Derby — owner’s choice, not a competitive limitation; he beat the Derby winner easily that season
- 62 stakes winners as a sire — including Triple Crown winner War Admiral
- Found in virtually every modern American Thoroughbred pedigree — no other racehorse’s genetic influence is as pervasive
Also Read: Was Secretariat the Fastest Horse to Ever Race? The Evidence
Also Read: The World’s Fastest Racehorses in History
About Miles Henry
Racehorse Owner & Author | 30+ Years in Thoroughbred Racing
Miles Henry (legal name: William Bradley) is a professional horseman based in Folsom, Louisiana. He holds Louisiana Racing License #67012 and has spent over three decades managing Thoroughbreds at premier tracks including Fair Grounds, Delta Downs, and Evangeline Downs.
Expertise & Hands-On Experience: Beyond the track, Miles has decades of experience in specialized equine care, covering everything from hoof health and nutrition to training protocols for Quarter Horses, Friesians, and Paints. Every guide on Horse Racing Sense is rooted in this “boots-on-the-ground” perspective.
30 of their last 90 starts
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