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James Sanders (Earth-616).jpg
Speed Demon

Full Name: James Sanders
First Appearance: Avengers #69 (as Whizzer)
Amazing Spider-Man Vol. 1 #222 (as Speed Demon)
Created by: Roy Thomas, Sal Buscema
Home Universe: Earth-616
Alignment: Neutral
Status: Alive
Place of Birth: New York City, New York
Citizenship: American
Base: Mobile
Affiliations: Sinister Six; formerly Hood's Criminal Army, Maggia, Thunderbolts, Sinister Syndicate, Squadron Sinister
Powers/Abilities: Good hand to hand combatant.
Height: 5' 11" (1.80 m)
Weight: 175 lbs (79 kg)
Hair Color: Blond
Eye Color: Brown
Unique Features:

"Y'know, I'm sick of you whining about what you can't do... Let's run like the devil and make Hell freeze over!"
— Speed Demon

James Sanders (of Earth-616), better known as the Whizzer and Speed Demon, is a former member of the Sinister Syndicate, the Thunderbolts, and the Hood Criminal Army; and is currently a member of the Sinister Six. Originally a disgruntled pharmacist, James agreed to become a super-villain in exchange for the power of super-speed.


James Sanders was a chemist who was tired of his job at Hudson Pharmaceutical Company. He was summoned by the Grandmaster in order to fight the Avengers. He was given a serum that gave him speed, and stamina and taken up the codename Whizzer. He and the other Squadron Supreme members were beaten by the Avengers. They one time fought the super team called the Defenders but were defeated. Doctor Strange erased Sander memories about being the Whizzer, and was sent back to his universe. He later came up with a powerful variant of the formula that given him even greater speed, and stamina then he had before. He clashed with Spider-Man and the Human Torch for the first time taking the name Speed Demon, as his original alias might have gotten him confused with the Golden Age hero of the same name. He fought with Spidey many times before joining the villains turned heroes group called the Thunderbolts, where he was kicked off for committing crimes under his old name, the Whizzer. His legs were broken for a time by Joystick. He currently is a member of Boomerang's Sinister Six.

Powers & Abilities


Speed Demon possesses various superhuman attributes after having them bestowed upon him by the Grandmaster.

  • Peak Human Strength: Speed Demon is as physically as a human can naturally be without being categorized. At his peak, He able to lift up 800 lbs.
  • Superhuman Speed: Speed Demon is able move at vast superhuman speeds. He is also unaffected by side-effects of these speeds such as high friction, air pressure, reduced oxygen, and kinetic impact. The intensity of his speed allows him to run across vertical structures and over large masses of water.
  • Superhuman Endurance: Speed Demon's musculature much more efficient than that of a normal human. As a result, his muscles produce considerably less fatigue toxins during physical activities. the tissues of Speed Demon's augmented body are tougher, more resilient and more resistant to certain forms of physical injury than those of a normal human. His body is particularly adapted to resist the natural rigors that moving at such extreme velocities would have on a normal human. An unenhanced human body would experience extreme friction to the skin, muscles, bones and particularly the joints and would result in permanent injury. Speed Demon is also more resistant to impact trauma than a normal human. He can withstand impacts, such as falling from several stories or being repeatedly struck with superhuman force, which would severely injure or kill a normal human while sustaining little to no injury himself.
  • Rapid Healing: If Speed Demon does sustain injuries, his body heals much faster than a normal human. He was able to recover from injuries after battle with Wolverine in a matter of hours.


Speed Demon is a good hand to hand combatant who specializes in various street-fighting techniques performed at superhuman speeds.

See Also