I think it would be wrong to claim Ali got knocked out. Have a read of this:
"Younger, stronger, and in his prime, the 31 year old Larry Holmes (35-0), the WBC Heavyweight Champion, was matched up against an old, shopwarn
Muhammad Ali (56-4) who was likely in the early stages of Parkinson's Disease, a disorder of the brain that slows one's reflexes and eventually leads to shaking (tremors) and difficulty with walking, movement, and coordination.
Unbeknownst to many, three months before the fight, Ali was ordered by the Nevada Athletic Commission to visit the Mayo Clinic for a neurological exam. The results exam were not made public at the time but contained the following results (source:BoxRec):
- Muhammad Ali was a little off when he tried to touch his finger to his nose.
- He had trouble coordinating his speech, and
- The fight legend couldn't hop on one foot well.
Despite the poor results, Nevada approved the fight with Holmes.
In an absolutely disgusting bout, the 31 year old champion dismantled the 38 year old legend in 10 rounds of a scheduled 15 round bout. There were no knockdowns, but Holmes dominated the fight and was given every round by all three judges. Finally, Ali's corner stopped the fight after the tenth round.
The TKO marked the first and only time Ali was stopped inside the distance in his 61 fight pro career".