Suffice it to say they've been unbeaten since 1971.
The formerly unbeaten Tucker stood a strapping 6-foot-5 to Tyson's 5-11, and had a 10-inch-longer reach.
He was unbeaten in 68 bouts.
Anyone privileged to see his unbeaten 154 at Headingley last summer, fought out through seven hours of rain-soaked determination, to win the first Test against the West Indies, will understand the power of his argument. Runs are crucial.
First came that February evening in Toyko when he shocked the known universe by knocking out Mike Tyson, who was not only unbeaten and untied but also virtually unscored upon, to capture sport's most prestigious crown.
Monday's and Tuesday's installments of the eight-hour miniseries landed in the top 10. But `Mason' and `Cosby,' et al, helped NBC extend its unbeaten streak to 34 weeks.
The 21-year-old champ is not only unbeaten and untied, he's also virtually unscored upon.
Tucker's strong first round raised hopes that this might be a fight with a capital F, not the quick swoon or survival scramble engaged in by other foes of Mighty Mike, now unbeaten in 31 go-arounds.