Which 1st Loss Was The Most Shocking?

From personal experience, I'd say Tyson losing to Buster.
Be hard to top that.
But I'm a little too young to remember Foreman losing to Ali, I've no doubt that was a massive WTF..

 

Tyson by far

foreman maybe second

 

Randall in third

i’m not sure I called the other shocking because they were all elite fight matchups and Lennox Lewis was still proving himself as a young fighter maybe Lewis 4

Trinidad was the favorite, but I don’t think he was a significant favorite specially moving up and weight. I would probably put that at five.

 

Tyson losing to Buster Douglas will....................very likely for the rest of history be the most shocking boxing loss ever.

 

Losing to a great opponent or a opponent
that has great ability shouldn't be shocking.
The only one on your list that was neither
is Oliver McCall.
So Lewis losing to him is the biggest surprise
on your list in my opinion.
And, Lewis losing in similar fashion
to the same level of opponent in
Rahman keeps him outside the top
5 Atg's in heavyweight history.

 

Out of the fights listed Tyson losing to Douglas was the most shocking because literally nobody expected Buster to have any chance at all.

Marco Antonio Barrera's first loss to Junior Jones was seen as pretty shocking at the time.

 

Tyson-Douglas for me too but I think Frazier´s 1st loss to Foreman should have been on the list too.

Who can forget the immortal:"Down goes Frazier!" from the commentator. No one expected the inexperienced and for many unknown challenger to win especially in such a brutal fashion.

Still the Douglas that had lost recently to Tony Tucker (in a good fight) and ko losses to David Bey and Mike White shouldn´t have given a peak Tyson more than 6 rounds of work.

The sight of Tyson with his mouth guard hanging from his mouth trying to get up is unforgettable.

 

Douglas-Tyson without a doubt. The 42-1 odds show what a shocker this one was.

Another one worth mentioning, also from 1990, would be Chiquita Gonzalez-Rolando Pascua. Gonzalez was unbeaten, and considered one of the hardest punchers p4p when he was stopped by Pascua, who was a total unknown at the time.

 

Definately! I remember Chiquita was starting to get a lot of press. Compared to Pipino Cuevas and made 5 quick defenses and looked utterly brilliant.

Superb ight from Pascua, took some serious punches before stopping Gonzalez.

Shame he lost the title in 1st defense and we never got to see a rematch with Chiquita.

 

Donald Curry losing to Lloyd Honeyghan was seen as a surprising loss given how highly rated Curry was seen back then.

 

Pascua looked great against Gonzalez, but looked like a completely different guy in that first defense against Melchor Cob Castro. Seemed like he was weight drained beyond belief, then just quit in the 10th round. He looked slower, and had no pop on his punches.

I would have liked to see a rematch as well, but Pascua just couldn't sustain the form he showed in his title winning effort.

I remember reading in one of the magazines back then that Pascua was destined to be a footnote in boxing history, and I guess that's not too far from the truth. At least he had that one great night anyway.

 

Easily Douglas-Tyson, though if you’re too young to remember it, Hopkins-Trinidad sent absolute shockwaves through what was at the time a very annoying Puerto Rican community dubbed, ‘Titosites.’ The only Hopkins fight I ever enjoyed.

 

I agree with those who said Mike Tyson's loss to James Buster Douglas was the most shocking. Personally, I do not believe #2 is even close to that for shock value.

 

Not strictly his first loss, but Jones losing to Tarver in the manner he did was pretty shocking.