Greb may have been the greatest fighter, pound-for-pound, who ever lived. Certainly, he was among the top 2 or 3. He combined the speed of Ray Robinson, the durability of Jim Jeffries, the stamina of Henry Armstrong, and the unbridled ferocity of Stanley Ketchel with a will to win unsurpassed in the annals of sport. At his peak, he was unbeatable, defeating virtually every middleweight, light heavyweight and heavyweight of his generation. A great, great fighter.