Did Muhammed Ali fight in Dublin in 1972?
Yes, Ali fought Al 'Blue' Lewis in Dublin on July 19, 1972. Ali won by TKO in the 11th round.
According to wikipedia: " Sylvester Stallone's original concept for Rocky, and the character Rocky Balboa, was inspired by his viewing of a fight between Muhammed Ali and Chuck Wepner. The idea of an underdog going the distance and putting up a fierce fight against all odds appealed to Stallone. " Wikipedia also says that the character Apollo Creed was 'loosely' based on Muhammed Ali.
Did Cassius Clay the fighter change his religion when he changed his name to Muhammed Ali and did he become a Muslim?
I once knew someone close to Ali and he told me Ali was a Muslim before he beat Sonny Liston for the heavyweight championship but didn't declare it to the world until after the fight and announced at that time that he would be known as Muhammed Ali for the rest of time. Guy was one heck of a great fighter and still is one of the most beloved athletes in history.