HOVERBOY #96
April, 1971

The Procrastinator technically remains undefeated by Hoverboy because he's been rescheduling their final showdown for 14 years and counting. he gained his powers when a dying time-traveler gave him his damaged chrono-ring, allowing him to put off until tomorrow any event he'd rather not do today.

Here's the cover from Hoverboy #96, which features the Procrastinator's first "appearance"- though he does not actually appear on panel for another three years.