List some examples of boxers ruining other boxers

Marquez ruined Pac. RIP Pac!

 

How?? by losing to a young, injured Mayweather, getting an immediate rematch and losing again.

 

Mayweather is way less willing to take risks in the ring. I've followed his career since the late 90s and he was a different fighter at 130 pounds and before the Castillo fight.

I feel Castillo beat him the first fight. Yes Mayweather won the rematch but it was not a shutout like people make it out to be. Again, Mayweather fought a completely different fight than the first one. He ran a lot more and surprise surprise, he won the fight in boring fashion.

 

That is pretty much being ruined.

 

Haye vs enzo.

 

He fights smart now, because its helps to preserve his career, and because at 130 he was even ground in terms of size and power, now everyone he steps in the ring with is the bigger man.

 

kid akeem-robert quiroga..they both ruined each other

vitali-briggs..granted briggs was already past it before vitali but man..i hope briggs doesn't fight again

 

I am surprised no one mentioned it earlier. This was the first thought I had after reading the thread title.

 

Mayorga forresr

 

Pavlik Taylor then Hopkins pavlik

 

If anything Bowe's trilogy with Holyfield is what ruined him. Golota was just there to pick up the pieces.