Former cruiserweight titles to the Englishman in 2007, was no match for the IBF, IBO, WBO and WBA title-holder.
The fight, originally scheduled for last December but postponed because Klitschko had a kidney stone removed in the same month, went as expected.
The first round was a one-sided affair with Mormeck's approach seemingly to suppress the Ukrainian.
Puerto Rican referee Luis Pabon counted out the challenger, who had fought just three times since losing to Haye - leaving Klitschko to celebrate a 57th career win.world cruiserweight champion Mormeck, who floored David Haye in losing his world.
(The Press Association)
