Guess the champ by weight class & professional career duration

I'm still blown away that Brown and Kingpetch fought the same amount of time down to a day!

 

Ding ding ding! Now, what's the thread betwixt the four?

 

(SI, btw, is the famous publication that once made that proclamation on behalf of Bivins)

 

Excellent guess but not it. Bit less obscure a fact.

 

I believe they all did...but we're looking for something that puts the three that were champs anyway in very exclusive company. I'll not say definitively they're the only three champs this applies to, but they're the only ones I could find...so if there are more they're needles in a haystack.

 

Would you like to know or still mulling it over?

 

Alright, while we wait on @Fogger here's the next batch to tide you all over.

Round Three:

• ??weight/??weight/??weight/??weight?, 22 years, 5 months, 7 days
• ??weight/??weight/??weight, 23 years, 3 months, 17 days
• ??weight, 13 years, 1 month, 17 days

This time in lieu of identifying their divisions, here are more hints (that should provide some guidance in piecing it all together but hopefully not be dead giveaways)

Two held world championships at welterweight.

Two held championships in multiple weight classes.

All three had very good amateur careers, but two had stellar ones: 93% and 95% rates of victory respectively with hundreds of bouts (the third had a still respectable 89% with under one hundred bouts) - all three, however, lost in Olympic trials.

One may or may not be retired. The others are.

All have considerable hitting power, but there's a clear hierarchy between them. The most powerful (a pure dynamo a cut above p4p in their original weight class especially) is a boxer-puncher, the next a counter-puncher, and the least a volume swarmer.



And, per usual, there is a common element between all three; this has to do directly with their boxing careers.

 

All four died of pneumonia.

Several other boxers also have, including Pat O'Grady (father of Sean), but I was hard-pressed to find any other world titlists besides those you guessed.