Fighters who skip the downward slope!

[Althugz]

Margarito should be the freshest in our minds.

Nobuo Nashiro wins the title vs. Castillo then loses to Munoz. (To be fair Nobuo had no business wining the title in the 1st place)
Buster Douglas beats Mike then nothing after that.
Foreman blasted Norton in 2, then that same year Ali did a number on him.
Joachime Alcine looks really good vs. Simms then get's blasted by Santos.
Paul Williams beats Margarito then goes on to loose to CQuintana.

Yeah, Foreman looked like a klutz against Ali.

Yes but to me Ali fought the perfect fight against Foreman rather than Foreman not being the same!

True but then didn't Foreman struggle with Ron Lyle straight after he lost to Ali? That was a great fight for as long as it lasted. Both men knocking each other down multiple times. I think I remember the commentators mentioning he may have lost something in the Ali fight. He didn't look the same...he won eventually though

[THE THIRD MAN]

I think the most famous of all was Sonny Liston, invincible monster one year to embarrassing chump the next. He continues to fight for five more years yet he is not a contender to fight Ellis or Frazier for Ali's vacant crown? I know Liston had his problems but his invincibility vanished after the Ali fights.
I think Foreman to a lessor extent in the 70's, he was only 28 when he retired the first time around, very young for a heavyweight to finish.

[rjj tszyu]

Yeah, Foreman looked like a klutz against Ali.

Yes but to me Ali fought the perfect fight against Foreman rather than Foreman not being the same!

True but then didn't Foreman struggle with Ron Lyle straight after he lost to Ali? That was a great fight for as long as it lasted. Both men knocking each other down multiple times. I think I remember the commentators mentioning he may have lost something in the Ali fight. He didn't look the same...he won eventually though

I think Ali psychologically ruined Foreman hence the visit from god after his defeat to Jimmy Young.

Ali had a knack of this turning "indestructables" into chumps! Remember Liston

[rjj tszyu]

Another one i've thought of is Tito! He seemed great then fought Hopkins and was never the same again.