Harold Diamond
Best known to movie fans as John Rambo's "stick-fighting" opponent in Rambo III, Harold Diamond in reality is one of Florida's most-famous pioneers in the sport of American Kickboxing. Born Harold Roth, he earned the nickname, "Nature Boy", for his long pony-tail, and a habit of wearing blue-jeans into the kick-boxing ring. In the mid-1970s, he became the first martial artist to compete in a kick-boxing match on Miami Beach. Fighting at the Miami Beach Convention Center on South Beach (The same center where Muhammad Ali defeated Sonny Liston for the World's Heavyweight Boxing Title), Roth ran up an impressive undefeated streak all by knockouts. He was "labeled" unbeatable, as he knocked out opponents throughout Miami-Dade and Broward Counties. In 1983 he won a Muay-Thai Championship and soon after retired with an undefeated record of 17-0 with 17 knockouts. His legendary local-fame lead to a Hollywood contract, and a name change to Harold Diamond. But, to south Florida fans, he will always be "Nature Boy" Harold Roth, the greatest kick boxer in the state's history.
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Biography from TMDB.
- Actor
- 6 on MovieCove · 9 credits in all
What are Harold Diamond's films like?
Across a limited sample of 3 MovieCove titles with a thematic analysis, their films lean Survival and Self.
What they feel like to watch
Ironic 0 · Wry 1 · Earnest 1
Light 2 · Serious 1 · Dark 0
A split, not a type: Grounded 1 · Stylized 0 · Heightened 2
A split, not a type: Gentle 2 · Charged 1 · Intense 0
Steady 0 · Shifting 2 · Whiplash 1
Straight-faced 0 · Some laughs 3 · Funny 0
Slow burn 0 · Even-paced 2 · Relentless 1
Casual 3 · Engaged 0 · Full focus 0
Easy watch 3 · Affecting 0 · Heavy 0
Resolved 3 · Open-ended 0 · Ambiguous 0
Roles they play
- Mentoras Merlin in King Arthur and the Knights of the Round Table (2017)
Moods and endings
AI-generated from each title's plot synopsis and cast list, with extra plot summaries, reviews and Parents Guide notes for titles the model may not know, and the model's own knowledge of the ones it recognizes. Only analyzed titles count, so this covers part of the filmography; the feel axes count films only for now.
Where can I watch Harold Diamond's films?
As of October 24, 2026, all 6 MovieCove titles stream on a subscription or free service, most on Tubi (6).
Subscription and free streaming for Harold Diamond's titles on MovieCove; rent and buy are not counted. Titles are listed by Midcredits score, highest first, at most 12 per service; a dashed chip is a producer credit or a minor one, such as a thanks. A service opens the browse page, which counts movies only, so its number can differ.
Filmography
9 credits, 6 with a MovieCove page.
Midcredits score: 1st percentile of all films
Gypsy (not in the MovieCove catalog yet)(1990)
Trained To Kill (not in the MovieCove catalog yet)(1989)
Killing American Style (not in the MovieCove catalog yet)(1988)
Spellbinder(1988)
Midcredits score: 37th percentile of all films
Rambo III(1988)
Midcredits score: 36th percentile of all films
Picasso Trigger(1988)
Midcredits score: 10th percentile of all films
Hard Ticket to Hawaii(1987)
Midcredits score: 26th percentile of all films
Can You Feel Me Dancing?(1986)
Midcredits score: 53rd percentile of all films
Career shape
Star power in the 74th percentile of 239,109 people with a billed film role, over a full career of 9 titles from 1986 to 2017.
Film career
- 1987Screen debut· Hard Ticket to Hawaii
Counts from TMDB across their full career, self appearances out; a title counts in every role they held on it. The ring is the typical Midcredits score (the median percentile) of the role's titles that are on MovieCove, shown from 5 scored.
How do Harold Diamond's films land?
Their typical MovieCove film has a Midcredits score in the 31st percentile, the median of all 6; across a limited sample of 3 films with reception data, the typical film sits in the 14th percentile for acclaim.
- 50th to 74th1
- 25th to 49th3
- Below 25th2
Shape of the crowd
3 of their 6 titles are Mixed.
- Universally Panned1
- Crowd Pleaser1
- Broadly Agreed1
- Mixed3
Reviewers score the acting 16/100 in their films, across 3 reviewed titles; fans 35, detractors 9. The element that speaks to their work as an actor.
Percentiles are each film's standing among all films on MovieCove; the typical film is the median, so one outlier cannot drag it. Percentiles and reviewer scores count the films IMDb credits them on, for now; the Midcredits score bands, the shape of the crowd and the two cards count their MovieCove titles, shows included (a show ranked among shows), appearances as themselves left out. A descriptor is the shape of a title's IMDb rating distribution against the catalog; "most divisive" needs a spread wider than half of all titles, and a card names only a principal credit: a craft role, and on a show a crew role or a run of episodes, never a courtesy credit or a one-off guest spot.
Who does Harold Diamond work with?
People who share at least 2 of Harold Diamond's MovieCove titles, grouped by what they did on them; Andy Sidaris shares the most, 2.
Directors
- Andy SidarisShared titles: Picasso Trigger (1988), Hard Ticket to Hawaii (1987)See all 2 shared titles with Andy Sidaris
Actors
- Cynthia BrimhallShared titles: Picasso Trigger (1988), Hard Ticket to Hawaii (1987)See all 2 shared titles with Cynthia Brimhall
- Dona SpeirShared titles: Picasso Trigger (1988), Hard Ticket to Hawaii (1987)See all 2 shared titles with Dona Speir
- Hope Marie CarltonShared titles: Picasso Trigger (1988), Hard Ticket to Hawaii (1987)See all 2 shared titles with Hope Marie Carlton
- Rodrigo ObregónShared titles: Picasso Trigger (1988), Hard Ticket to Hawaii (1987)See all 2 shared titles with Rodrigo Obregón
Composers, cinematographers and editors
- Gary StockdaleShared titles: Picasso Trigger (1988), Hard Ticket to Hawaii (1987)See all 2 shared titles with Gary Stockdale
- Howard WexlerShared titles: Picasso Trigger (1988), Hard Ticket to Hawaii (1987)See all 2 shared titles with Howard Wexler
- Michael HaightShared titles: Picasso Trigger (1988), Hard Ticket to Hawaii (1987)See all 2 shared titles with Michael Haight
Producers
- Arlene SidarisShared titles: Picasso Trigger (1988), Hard Ticket to Hawaii (1987)See all 2 shared titles with Arlene Sidaris
