Tumbler was a noted acrobatic criminal who had encounters with Captain America on more than one occasion. He was hired by The Secret Empire to battle Captain America but was murdered by Moonstone, who was also working for the Secret Empire and managed to pin his death on Rogers.[1] His brother, Michael Keane, later assumed the mantle of the Tumbler.[2]



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Footnotes

  1. Captain America #169
  2. Captain America #291
  3. Marvel Legacy: The 1960s Handbook #1
  4. Official Handbook of the Marvel Universe A-Z hardcover Vol. 12



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