On April 27, 1956, Rocky Marciano, the undefeated heavyweight boxing champion, announced his retirement from professional boxing at the age of 31. Marciano had held the title since 1952 and defended it six times, cementing his status as one of the greatest boxers of all time.

Marciano's career was nothing short of remarkable. He began boxing professionally in 1948 and quickly made a name for himself with his powerful punches and relentless fighting style. In 1952, he earned a shot at the heavyweight title against Jersey Joe Walcott. Marciano won the fight by knockout in the 13th round, becoming the new heavyweight champion of the world.

Throughout his title reign, Marciano faced some of the biggest names in boxing, including Ezzard Charles, Roland La Starza, and Archie Moore. He defended his title successfully in each bout, often winning by knockout. His final fight was against Moore on September 21, 1955, which Marciano won by knockout in the 9th round.

At the time of his retirement, Marciano's record stood at an incredible 49 wins, 0 losses, and 0 draws, with 43 of his wins coming by way of knockout. He remains the only heavyweight champion in boxing history to retire undefeated.

Marciano's legacy extends far beyond his impressive record. He was known for his humility, his strong work ethic, and his dedication to his family. He was also a symbol of hope and inspiration for many Italian-Americans, who saw him as proof that anything was possible through hard work and determination.

Today, Rocky Marciano is remembered as one of the greatest boxers of all time, and his retirement on April 27, 1956, marked the end of an era in boxing history. His undefeated record and his impact on the sport continue to inspire athletes and fans around the world.