He reflected that with slightly more preparation time, his body would have been conditioned to perform for the full 12 rounds, rather than fatigue so dramatically.
The 28-year-old said: "I feel with just a little change in certain areas of the prep, we could have built the engine for 12 full rounds under stress."
Despite the somewhat orchestrated pre-fight animosity between McGregor and Mayweather, the Dubliner had some kind words about his 50-0 opponent.
"He is a heck of a boxer. His experience, his patience and his endurance won him this fight, hands down.
"I always told him he was not a fighter, but a boxer, but sharing the ring with him, he is certainly a solid fighter,' he added.
Finally, the MMA superstar teased that his next encounter might come sooner than you might think.
He said: "Onto the next one", but whether his next big pay day is in the octagon or under the Queensbury rules remains to be seen.