Name a bum that beat a good fighter?

[Tony Trick-Pony]

Pat Lawlor beat Roberto Duran. Duran threw his shoulder out and had to quit after six. Several years later, an ancient Duran beat him by decision in the rematch.

Willy Wise outhustled Julio Cesar Chavez by decision in a huge upset. He got revenge in the rematch by second round TKO.

Of course, both were old men when they lost. Danny Williams beat Mike Tyson when Tyson's knee blew out. One example of a good(not great) fighter losing to a guy in his prime was Charles "The Hatchet" Brewer getting iced in one round from an uppercut by Lonnie "Honeybee" Beasley. Beasley wasn't a bum per se, but he didn't accomplish much before or after. He was fun to watch in the ring, though. There was never a rematch but Brewer did win a title later on.

[Sweet Pea 50]

Jose Luis Castillo, he beat Floyd Mayweather but was robbed.

You could make a argument for JLC winning their first fight.

Castillo wasn't a "bum".

Far from it.

[Dodger07]

Boone over Stevenson
Buster over tyson
Purity over klitchko
Prescott over khan
Rahman over Lewis
Spinks over ali

[jreckoning]

My favorite in history is Iran the Blade Barkley lighting up Tommy Hearns.

Hearns was beating him up until the Blade came up with a little something something right hand in the 3rd and knocked him out.

I won't call Blade a bum though. Just a surprising upset that I enjoyed.

Barkley was a big underdog.

[Spoon23]

Floyd Mayweather on May 2nd

Lol Floyd's not a bum he's just a running hugging diva hehe

[danceswithfire]

baldomir vs zab judah

sonnyboy jaro vs wonjongkam

[The plunger man]

Michael bentt beat Tommy morrison...rank outsider and Morrison was in his prime.
Buster Douglas beat Mike Tyson ...buster Douglas was 50to1 at the bookies and was not ranked in the top 10
Max schmelling Ko'ed louis ....again was a not considered a threat to louis at all

[STREET CLEANER]

Pat Lawlor beat Roberto Duran. Duran threw his shoulder out and had to quit after six. Several years later, an ancient Duran beat him by decision in the rematch.

Willy Wise outhustled Julio Cesar Chavez by decision in a huge upset. He got revenge in the rematch by second round TKO.

Of course, both were old men when they lost. Danny Williams beat Mike Tyson when Tyson's knee blew out. One example of a good(not great) fighter losing to a guy in his prime was Charles "The Hatchet" Brewer getting iced in one round from an uppercut by Lonnie "Honeybee" Beasley. Beasley wasn't a bum per se, but he didn't accomplish much before or after. He was fun to watch in the ring, though. There was never a rematch but Brewer did win a title later on.

You are the only one here that have some that fit the criteria. The other would be Ross Purity.

All the other ones mentioned here actually had titles or beat some other fighters to get a shot

[BrometheusBob.]

pac lost to floyd. see what i did there

[BrometheusBob.]

Max baer vs james braddock

Your sig bro lmfaooo

baldomir vs zab judah

sonnyboy jaro vs wonjongkam

This one is an example of a fight between two bums