Because Double brought it up. So, the Hearns that KO'd Andries vs. the Tarver that KO'd Jones in the 2nd match. Or the Hearns that out-boxed Barkley vs. that same Tarver
Pretty confident in saying Tarver puts Tommy to sleep at some point. Hearns would be winning the fight at the time he gets caught.
I think the Hearns of the Andries fight might have a shot here. The Hearns of the Hill/Barkley fights might've been too slow and stationary by that time.