Roscoe is a villain with the ability to generate and manipulate centrifugal forces. As the Top, he's been a member of the Flash's Rogues, the League of Villainy and the Acolytes of Zoom.
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History
PRE-CRISIS FIRST APPEARANCE: The Flash #122 (August, 1961)
POST-CRISIS DEATH APPEARANCE: Flash #222 (July, 2005)
POST-FLASHPOINT FIRST APPEARANCE: Flash Annual #4 (September, 2015)