On April 15, 1947, Jackie Robinson, age 28, becomes the first African American player in Major League Baseball when he steps onto Ebbets Field in Brooklyn to compete for the Brooklyn Dodgers. Robinson broke the color barrier in a sport that had been segregated for more than 50 years. Exactly 50 years later, on April 15, 1997, Robinson’s groundbreaking career was honored and his uniform number, 42, was retired from Major League Baseball by Commissioner Bud Selig in a ceremony attended by over 50,000 fans at New York City’s Shea Stadium. Robinson’s was the first-ever number retired by all teams in the league.

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Jack Roosevelt Robinson was born January 31, 1919, in Cairo, Georgia, to a family of sharecroppers. Growing up, he excelled at sports and attended the University of California at Los Angeles, where he was the first athlete to letter in four varsity sports: baseball, basketball, football and track. After financial difficulties forced Robinson to drop out of UCLA, he joined the army in 1942 and was commissioned as a second lieutenant. After protesting instances of racial discrimination during his military service, Robinson was court-martialed in 1944. Ultimately, though, he was honorably discharged.

After the army, Robinson played for a season in the Negro American League. In 1946, he spent one season with the Canadian minor league team the Montreal Royals. In 1947, Robinson was called up to the Majors and soon became a star infielder and outfielder for the Dodgers, as well as the National League’s Rookie of the Year. In 1949, the right-hander was named the National League’s Most Valuable Player and league batting champ. Robinson played on the National League All-Star team from 1949 through 1954 and led the Dodgers to six National League pennants and one World Series, in 1955. He was inducted into the Baseball Hall of Fame in 1962, his first year of eligibility.

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Despite his talent and success as a player, Robinson faced tremendous racial discrimination throughout his career, from baseball fans and some fellow players. Additionally, Jim Crow laws prevented Robinson from using the same hotels and restaurants as his teammates while playing in the South.

After retiring from baseball in 1957, Robinson became a businessman and civil rights activist. He died October 24, 1972, at age 53, in Stamford, Connecticut.