"Almos" a knockdown (of a Champion)

[Caractacus]

Two Ton tony Galento had become famous for the rest of his life with knocking down the great Joe Louis(1936).
Chuck Wepner is still primarily famous for his knocking down the great Muhammad Ali (1975).
What challengers do you know whom just may have become a "house-hold" word 'if only"
the Champion had went to the canvas (especially if the challenger had been like a 9 to 1 under-dog ?

[Caractacus]

-1949-

[Expug]

Frankie Depaula dropped Bob Foster in the first round of their title fight.
Foster annihilated him after that but he did drop him.
Depaula was unfortunately whacked by nefarious characters a few years later.