Most Knockouts in Boxing History

The most knockouts in boxing history is usually credited to Britain’s Billy Bird, who is listed with roughly 138 career knockouts across the 1920s and 1930s. That figure is widely repeated, but it comes from an era of patchy record-keeping and should be treated as approximate rather than a firm record.

Career knockout totals are among the hardest numbers in sport to pin down, because so many early fights went poorly documented or unrecorded. For that reason, the most reliable answer to who has the most knockouts is Archie Moore, whose 131 stoppages between 1935 and 1963 are the best-verified high total in boxing. Here is the leaderboard of the sport’s biggest punchers, along with a clear-eyed look at how much confidence each figure deserves. All figures are as of the 2025 season and reflect the best available records.

The disputed record: Billy Bird and roughly 138 knockouts

Billy Bird fought hundreds of times in the 1920s and 1930s, a period when boxers took bouts constantly and results were often logged only in local newspapers. He is commonly credited with about 138 knockouts, a total that once appeared in record books as the career high. The problem is verification: his complete record is incomplete and contested, so the number is best understood as an estimate from a very different era of the sport.

That uncertainty is not unique to Bird. Several early-20th-century fighters carry huge but shaky knockout counts, which is why boxing historians increasingly point to a better-documented name when asked for the true record.

The best-documented record: Archie Moore and 131

Archie Moore, the great light-heavyweight who fought from 1935 to 1963, recorded 131 knockouts according to standard modern references. It is the most knockouts by any world champion and the highest career total that can be verified with confidence. Because Moore’s fights are far better documented than pre-war records, his 131 is the figure most often cited as the genuine knockout record.

Moore also holds a place in the wider story of the sport’s greats, a group profiled on our greatest boxers leaderboard.

The full leaderboard of career knockout leaders

The table below ranks the boxers most often listed with the highest career knockout totals. Figures for early-1900s fighters are approximate and vary by source.

Rank	Career KOs	Boxer	Era	Confidence
1	~138	Billy Bird	1920s-1930s	Low, poorly documented
2	131	Archie Moore	1935-1963	High, best-verified
3	~128	Sam Langford	1902-1926	Low, records incomplete
4	~126	Young Stribling	1921-1933	Low, records incomplete
5	~120	Buck Smith	1980s-1990s	Moderate, weaker opposition
6	~114	Kid Azteca	1932-1961	Moderate
7	108	Sugar Ray Robinson	1940-1965	High
8	103	Sandy Saddler	1944-1956	High
9	~99	Jimmy Wilde	1911-1923	Low, records incomplete

The pattern is clear: the very highest totals belong to fighters from the early 1900s, whose records are hardest to trust, while the most reliable big numbers come from mid-century champions like Moore, Robinson and Saddler.

Why the numbers are so uncertain

Boxing had no central record-keeper for most of its history. In the early 20th century, fighters competed dozens of times a year, often in bouts that ended in “no-decision” or went unreported outside a single city’s newspapers. Modern databases have reconstructed much of this, but gaps remain, and different sources credit the same fighter with different totals. That is why a headline figure like Billy Bird’s 138 deserves an asterisk in a way that Archie Moore’s 131 does not.

The volume of fights also matters. Boxers like Bird and Langford fought several hundred times, far more than any modern champion, so their raw knockout counts are inflated partly by sheer activity against uneven competition.

How knockouts fit the bigger picture

A knockout is boxing’s most decisive outcome, and the punchers who pile them up are a different breed from the technicians who win on the cards. Understanding when a stoppage counts is itself worth a look, which our guide to how boxing scoring works explains. Power and durability also underpin the sport’s other headline record, the perfect professional slate tracked on our undefeated boxers leaderboard.

Why the record matters

Career knockouts reward power, timing and longevity, but they also reflect the era a fighter competed in. The honest answer to this record is layered: Billy Bird carries the biggest number, Archie Moore carries the most trustworthy one, and the truth sits somewhere in the imperfect records of a century of boxing.

The short version: Billy Bird is traditionally credited with the most knockouts, around 138, but that total is loosely documented. Archie Moore’s 131 is the best-verified career record, ahead of well-documented punchers like Sugar Ray Robinson (108) and Sandy Saddler (103). As of the 2025 season, early-1900s figures remain approximate and should be read with caution.