Were all Marciano's fights on the level

[Master]

Marciano arguably fought in the weakest era in heavyweight history not including the grappling era although Dempsey is right on the fringe of grappling and he ducked every black man of his era. The only prime heavyweight Marciano ever fought was Lastarza and he barely beat him the first time. He struggled with a Walcott who was about ten years out of his prime, almost got beat by a shop worn Charles and beat up grandfather Louis.

You call Carmine Vingo, Rex Layne, Harry Kid Matthews, Roland LaStarza, Ezzard Charles, WEAK

Beside Charles those names are weak but Rocky can beat only what they put in front of him.