Walter O'Malley was a prominent figure in Major League Baseball, best known for his role as the owner of the Brooklyn Dodgers and later the Los Angeles Dodgers. He was born on October 6, 1903, in the Bronx, New York City. O'Malley graduated from Fordham University and began his career in baseball as a lawyer and businessman.

In 1944, O'Malley became involved with the Dodgers when he purchased a controlling interest in the team from the previous owner, Branch Rickey. Under O'Malley's leadership, the Dodgers achieved significant success, including winning the National League pennant in 1947, 1949, 1952, 1953, and 1955. The team also won its first World Series championship in 1955.

O'Malley was instrumental in the integration of baseball, as he was one of the key figures in signing Jackie Robinson, the first African American player in the modern era of Major League Baseball. Robinson made his debut with the Dodgers in 1947, breaking the color barrier and paving the way for future generations of players.

In the early 1950s, O'Malley faced challenges with Ebbets Field, the Dodgers' home stadium in Brooklyn, which was becoming outdated and inadequate for the team's needs. O'Malley sought to build a new stadium, but negotiations with the city of New York were unsuccessful. As a result, he made the controversial decision to relocate the Dodgers to Los Angeles in 1958, where they became the first Major League Baseball team on the West Coast.

The move to Los Angeles proved to be a significant success for O'Malley and the Dodgers. The team quickly established a strong fan base and continued to win championships, including World Series titles in 1959, 1963, 1965, and 1981. O'Malley was also involved in the development of Dodger Stadium, which opened in 1962 and became one of the most iconic ballparks in baseball.

O'Malley's tenure as owner was marked by his business acumen and innovative approaches to marketing and promoting the team. He was a pioneer in the use of television to broadcast games, which helped to expand the Dodgers' reach and popularity.

In addition to his contributions to the Dodgers, O'Malley played a role in the broader landscape of baseball, serving on various committees and influencing the direction of the sport. He was a member of the National League's Board of Directors and was involved in discussions regarding the expansion of Major League Baseball.

Walter O'Malley passed away on August 9, 1979.