BoxRec

154,15 rounds.

Hearns, KO7

The Hitman would get the better of the southpaw Kalule behind his quick left jabs through the first 5 rounds before he puts Kalule away in the 6th round with his big right hand.

I am not saying Hearns would beat every 154 pound fighter in history.
But I would not put any money against Hearns against any 154 pound fighter in history.
Hearns wins this one mid round stoppage

At 154lbs, I have never seen a fighter in a weight class so perfect as the great Thomas "The Hitman" Hearns. Especially, in 1984 when he decapitated the great Roberto Duran and destroyed Fred Hutchins.

Hearns by knockout without a question in 7 rounds or less. That if he doesn't break his right hand like he did with Wilfred Benitez and Marvelous.

Hearns by 11th round stoppage.