Jack Roosevelt Robinson, born on January 31, 1919, in Cairo, Georgia, stands as one of the most transformative figures in American sports history, a man whose courage and talent permanently altered the landscape of professional baseball and the broader civil rights movement. Raised in Pasadena, California, Robinson emerged as a phenomenal four-sport athlete at Pasadena Junior College and later at the University of California, Los Angeles, where he gained greater renown as a star running back for the UCLA Bruins football team than for his baseball prowess. His collegiate athletic career was interrupted by World War II, during which he was drafted into the Army and faced a court-martial for refusing to move to the back of a segregated bus, an act of defiance that resulted in his honorable discharge and foreshadowed the principled resistance that would define his public life.

Following his military service, Robinson joined the Kansas City Monarchs of the Negro leagues, where his exceptional skill and composure caught the attention of Branch Rickey, the general manager of the Brooklyn Dodgers. Rickey, seeking the ideal candidate to break Major League Baseball's color line, selected Robinson for his character as much as his athletic ability, and on April 15, 1947, Robinson made history by starting at first base for the Dodgers, becoming the first African American to play in the MLB in the modern era. His debut heralded the end of racial segregation in professional baseball, which had relegated Black players to the Negro leagues since the 1880s, and his commitment to nonviolence in the face of relentless hostility and discrimination challenged the foundational basis of segregation that marked American life. Over a distinguished ten-year MLB career, Robinson earned the inaugural Rookie of the Year Award in 1947, was named an All-Star for six consecutive seasons from 1949 through 1954, and captured the National League Most Valuable Player Award in 1949, becoming the first Black player so honored. He appeared in six World Series and played a crucial role in the Dodgers' 1955 World Series championship, and his first-year eligibility induction into the Baseball Hall of Fame in 1962 cemented his legacy as a pioneer.

Beyond his on-field achievements, Robinson continued to break barriers throughout his post-playing career, becoming the first Black television analyst in MLB and the first Black vice president of a major American corporation, Chock full o'Nuts. In the 1960s, he helped establish the Freedom National Bank, a Black-owned financial institution based in Harlem, New York, and he remained a vocal and active contributor to the civil rights movement. After his death on October 24, 1972, Robinson was posthumously honored with the Congressional Gold Medal and the Presidential Medal of Freedom in recognition of his profound impact on and off the field. In 1997, MLB retired his uniform number 42 across all major league teams, making him the first professional athlete in any sport to receive such an honor, and since 2004, the league has celebrated Jackie Robinson Day every April 15, with players across all teams wearing the number 42 in tribute to his enduring legacy as a trailblazer whose influence transcended the game of baseball.