Mickey Charles Mantle (October 20, 1931 - August 13, 1995), nicknamed The Commerce Comet and The Mick, was an American professional baseball player. Mantle played his entire Major League Baseball (MLB) career with the New York Yankees as a center fielder and first baseman, from 1951 through 1968. Mantle was one of the best players and sluggers, and is regarded by many as the greatest switch hitter in baseball history. Mantle was inducted into the National Baseball Hall of Fame in 1974 and was elected to the Major League Baseball All-Century Team in 1999.

Mantle was born on October 20, 1931 in Spavinaw, Oklahoma, the son of Lovell (nee Richardson) Mantle (1904-1995) and lead miner Elvin Charles "Mutt" Mantle (1912-1952). He was of at least partial English ancestry; his great-grandfather, George Mantle, left Brierley Hill, in England's Black Country, in 1848.  Mutt named his son in honor of Mickey Cochrane, a Hall of Fame catcher. Later in his life, Mantle expressed relief that his father had not known Cochrane's true first name, as he would have hated to be named Gordon. Mantle spoke warmly of his father, and said he was the bravest man he ever knew. "No boy ever loved his father more", he said. Mantle batted left-handed against his father when he practiced pitching to him right-handed and he batted right-handed against his grandfather, Charles Mantle, when he practiced throwing to him left-handed. His grandfather died at the age of 60 in 1944, and his father died of Hodgkin's disease at the age of 40 on May 7, 1952.  When Mantle was four years old, his family moved to the nearby town of Commerce, Oklahoma, where his father worked in lead and zinc mines. As a teenager, Mantle rooted for the St. Louis Cardinals. Mantle was an all-around athlete at Commerce High School, playing basketball as well as football (a halfback, he was offered a football scholarship by the University of Oklahoma) in addition to his first love, baseball. His football playing nearly ended his athletic career. Kicked in the left shin during a practice game during his sophomore year, Mantle developed osteomyelitis in his left ankle, a crippling disease that was incurable just a few years earlier. Mantle's parents drove him at midnight to Oklahoma City, Oklahoma, where he was treated at the Children's Hospital with the newly available penicillin, which reduced the infection and saved his leg from requiring amputation.

Answer the following question by taking a quote from the article: When did he decide to stop playing football?
he was treated at the Children's Hospital with the newly available penicillin, which reduced the infection and saved his leg from requiring amputation.