Marvel Database

John Robert Keane (Earth-616)

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A noted acrobatic criminal who had encounters with Captain America on more than one occasion. He was assassinated by Moonstone on orders from the Secret Empire. His brother, Michael Keane, later assumed the mantle of the Tumbler[1].

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  1. Captain America #291
  2. Official Handbook of the Marvel Universe A-Z hardcover Vol. 12

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