Demetrious “Mighty Mouse” Johnson retired in 2023 as the most accomplished flyweight in mixed martial arts history. His career spanned two decades and two major promotions, during which he set records that may never be broken. But his official record, physical measurements, and personal finances are surrounded by more uncertainty than many fans realize.
Johnson, who was born on August 13, 1986, in the United States, made his professional MMA debut in 2006. Over the next 17 years, he fought for the UFC and ONE Championship, becoming the inaugural UFC flyweight champion and later capturing ONE gold. According to Wikipedia, his final career record stands at 25 wins, 4 losses, and 1 draw. ESPN reported his retirement after his May 2023 victory over Adriano Moraes at ONE Fight Night 10.
Throughout his career, Johnson was known for his exceptional speed, technical precision, and well-rounded skill set. He compiled wins by knockout, submission, and decision, reflecting a style that could adapt to any opponent. His legacy, however, extends beyond mere numbers — he is widely regarded as one of the greatest pound-for-pound fighters ever to step into the cage.
What Is Demetrious Johnson’s MMA Record and UFC Career?
Demetrious Khrisna Johnson
Mighty Mouse
27-3-1
5’3″ / 125 lb (1.6 m / 56 kg)
Not officially disclosed
Wife (name not publicly confirmed)
Retired (May 2023)
August 13, 1986
Key Insights About His Career
- Demetrious Johnson is widely regarded as one of the greatest pound-for-pound MMA fighters in history.
- He holds the record for most consecutive UFC flyweight title defenses — 11 in a row.
- He became the UFC’s first-ever flyweight champion in 2012 by defeating Joseph Benavidez.
- After leaving the UFC, he won the ONE Flyweight World Grand Prix in 2019 and later claimed the ONE flyweight title.
- His overall record varies by source: UFCStats lists 27-3-1, while ESPN and other outlets report 25-4-1 at retirement.
- ESPN described him as widely regarded as one of the best flyweights ever.
Career Snapshot
| Category | Details |
|---|---|
| Full Name | Demetrious Khrisna Johnson |
| Nickname | Mighty Mouse |
| Date of Birth | August 13, 1986 |
| Height | 5 ft 3 in (1.6 m) |
| Weight | 125 lb (56 kg) |
| Reach | 66 in (168 cm) |
| Stance | Orthodox |
| Record (UFCStats) | 27-3-1 |
| Record (ESPN) | 25-4-1 |
| Team | AMC Pankration |
| Division | Flyweight |
The difference between the two record figures is explained by how each source counts fights. UFCStats, the promotion’s official statistics database, lists a promotional record of 27-3-1, which may include exhibition bouts or fights outside standard championship competition. ESPN’s MMA profile and other major outlets report 25-4-1 as his final career record after his ONE Championship run.
What Are Demetrious Johnson’s Height, Weight, and Reach?
Johnson’s physical dimensions are consistently reported across official sources, though minor variations exist between databases. According to Sherdog, he stands 5 feet 3 inches tall, weighing 125 pounds in the flyweight division. His reach is listed at 66.1 inches (about 168 cm) by Cagewalks and French Wikipedia.
Height and Weight in Context
At 5’3″, Johnson was one of the shorter fighters in the UFC flyweight division. His compact frame, combined with a 66-inch reach, allowed him to generate significant power in close quarters while maintaining exceptional mobility. UFCStats officially lists his height at 5’3″ and his weight at 125 lb in the flyweight context.
Division and Weight Class Variations
While most sources list Johnson at 125 lb, some databases — including his official ONE Championship athlete page — also reference 135 lb. This discrepancy arises because ONE Championship labels fighters differently across weight classes; Johnson competed in the ONE bantamweight division, which overlaps with the UFC flyweight range in certain contexts.
The 125 lb figure is the standard for UFC flyweight, while 135 lb appears in ONE Championship materials due to their division-naming conventions. Both numbers refer to the same fighter at different stages of his career under different promotional rules.
Who Is Demetrious Johnson’s Wife and What Is His Net Worth?
Spouse and Family Information
Publicly available sources do not provide a confirmed name for Demetrious Johnson’s wife. While various online profiles mention that he is married, the provided research materials — including Wikipedia, ESPN, Sherdog, and ONE Championship — do not identify his spouse by name or provide verified family details. This information remains private.
Net Worth and Career Earnings
No verified career-earnings figure or audited net worth estimate for Johnson appears in the provided sources. Net worth figures for MMA fighters are often speculative unless tied to official disclosed bout purses or financial reporting. Without a reliable source — such as a state athletic commission payout database or a direct financial disclosure — no responsible number can be stated.
Net worth estimates for fighters frequently circulate online without attribution. The provided research contains no verified payout data, audited financial statements, or official disclosure that would allow a credible figure to be reported for Demetrious Johnson.
Where Can I Find Demetrious Johnson Merchandise?
The provided research materials do not include direct evidence of an official Demetrious Johnson merchandise store, apparel line, or licensed product catalog. Sources such as his ONE Championship athlete page, ESPN profile, and Wikipedia entry focus on his competitive record and biography rather than commercial offerings.
Fighters in major promotions often have merchandise available through their organization’s official shop or through licensed memorabilia partners, but no specific product links or store URLs were present in the supplied information. Fans seeking “Mighty Mouse” apparel or signed items would need to check official UFC or ONE Championship retail channels directly.
Official fighter merchandise is typically listed on the promotion’s website (UFC or ONE Championship) or through licensed memorabilia vendors. No direct links were available in the provided sources, so checking those official channels is the recommended approach.
What Is the Career Timeline of Demetrious Johnson?
- 2006 — Professional MMA debut.
- 2011 — UFC debut.
- 2012 — Won the UFC Flyweight Championship by defeating Joseph Benavidez, becoming the division’s first-ever champion.
- 2012–2018 — Recorded 11 consecutive title defenses, a UFC flyweight record.
- 2018 — Lost the title to Henry Cejudo; subsequently traded to ONE Championship as part of a fighter exchange.
- 2019 — ONE Championship debut; won the ONE Flyweight World Grand Prix.
- 2021 — Lost to Adriano Moraes by knee KO.
- 2022 — Defeated Adriano Moraes by flying knee KO/TKO to win the ONE flyweight title.
- 2023 — Defeated Adriano Moraes by unanimous decision at ONE Fight Night 10. ESPN reported his retirement from MMA shortly after.
What Is Known and What Remains Unclear About Demetrious Johnson?
| Established Information | Information That Remains Unclear |
|---|---|
| Born August 13, 1986. | Exact net worth is unknown; estimates vary widely and are not sourced. |
| Height: 1.6 m (5’3″); Weight: 56 kg (125 lb) per official UFC and ONE sources. | Record discrepancy: ESPN lists 25-4-1 while UFCStats shows 27-3-1 (likely due to inclusion of exhibitions or non-UFC fights). |
| UFC record per UFCStats: 27-3-1. | Wife’s name is not publicly confirmed from the provided sources. |
| Holds 11 consecutive UFC flyweight title defenses — a promotional record. | No official merchandise store or licensed product catalog was identified. |
Why Is Demetrious Johnson Considered an MMA Legend?
Johnson’s legacy rests on two pillars: unprecedented dominance in the UFC flyweight division and a seamless transition to international competition in ONE Championship. He became the first UFC flyweight champion in 2012 and then defended that title 11 consecutive times, a record that still stands. After a loss to Henry Cejudo in 2018, he moved to ONE Championship, where he won the 2019 Flyweight World Grand Prix and later claimed the ONE flyweight title in 2022.
The record difference between UFCStats and ESPN highlights a broader point about sourcing context. UFCStats is the official UFC statistics database, while ESPN and other outlets compile career records that may include different fight counts depending on how they classify exhibitions, non-title bouts, or fights under different promotional rules. Regardless of the exact number, both sources agree on his place among the sport’s elite.
He is frequently debated as the greatest pound-for-pound fighter in MMA history, particularly in the lighter weight classes. His combination of speed, technical striking, grappling, and fight IQ allowed him to dominate across two major promotions over nearly two decades.
What Do Official Sources Say About Demetrious Johnson?
“Demetrious Khrisna Johnson (born August 13, 1986) is an American former professional mixed martial artist.”
— Wikipedia
“Demetrious Johnson Record: 27-3-1”
— UFCStats
“Fourteen-time Flyweight World Champion”
— ONE Championship
“Johnson to enter UFC Hall of Fame (2025)”
— ESPN
These sources — spanning official promotion databases, encyclopedia entries, and major sports journalism — consistently describe Johnson as a dominant champion. BBC Sport also covered his retirement, noting his status as one of the most accomplished flyweights in MMA history.
What Is the Legacy of Demetrious Johnson?
Demetrious Johnson retired as the most decorated flyweight in MMA history. He was the UFC’s first flyweight champion, set a record for consecutive title defenses that may never be surpassed, and then replicated his success in ONE Championship. His career record of 25-4-1 (or 27-3-1, depending on the source) reflects sustained excellence over 17 years. While his net worth remains undisclosed and some personal details remain private, his professional achievements are thoroughly documented. For a deeper look at the division he once dominated, see our UFC Flyweight Champions history article.
Frequently Asked Questions
How old is Demetrious Johnson?
He was born on August 13, 1986, which makes him 38 years old as of 2025.
What is Demetrious Johnson’s reach?
His reach is listed at 66.1 inches (about 168 cm) according to Cagewalks and French Wikipedia.
What team does Demetrious Johnson fight for?
He trained out of AMC Pankration during his career.
What is Demetrious Johnson’s fighting style?
He is known as a well-rounded fighter with wins by knockout, submission, and decision, reflecting a highly adaptive skill set.
Why is Demetrious Johnson called Mighty Mouse?
The nickname “Mighty Mouse” was given early in his career, referencing his small stature and explosive fighting style.
Did Demetrious Johnson fight in ONE Championship?
Yes. He debuted in ONE in 2019, won the Flyweight World Grand Prix that same year, and later captured the ONE flyweight title in 2022.
What is Demetrious Johnson’s UFC record?
UFCStats lists his promotional record at 27-3-1, which includes his title reign and multiple defenses.
Is Demetrious Johnson in the UFC Hall of Fame?
ESPN reported in 2025 that Johnson is set to enter the UFC Hall of Fame.
Who did Demetrious Johnson lose to in the UFC?
He lost to Henry Cejudo in 2018, which ended his flyweight title reign and led to his move to ONE Championship.
Does Demetrious Johnson have official merchandise?
No official merchandise store or licensed product line was identified in the provided sources. Fans should check official UFC or ONE Championship retail channels.
Oliver Arthur Morgan Harrison is a staff writer for StoryShift.uk, covering UK news, culture, politics and technology. He works under Editor-in-Chief Maarika Tamm and UK Managing Editor Oliver Grant, following the newsroom standards for sourcing, verification and fact-checking set out in our editorial policies.