Let's see who else he can beat. He can 100% beat these HW champs at these stages.

-38 year old Ali in the Holmes fight
-38 year old Holmes in the Tyson fight
-39 year old Tyson in the McBride fight
-39 year old Holyfield in the RUiz fights
-48 year old Foreman in the Briggs fight

He could take all of those guys within 3 rounds, with the exception of the 48 year old Foreman whom might eke out an losing decision. Foreman was tough as hell for an old geezer.