Daniel Francis O'Connell (January 21, 1927 – October 2, 1969) was an American infielder in Major League Baseball for the Pittsburgh Pirates (1950; 1953), Milwaukee Braves (1954–57), New York/San Francisco Giants (1957–59) and Washington Senators (1961–62). During his MLB career, he was listed at 5 feet 11 inches (1.80 m) tall and weighed 168 pounds (76 kg). He threw and batted right-handed.

As a member of the San Francisco Giants, O'Connell scored the first run in the first big-league baseball game played on the West Coast on April 15, 1958. After drawing a base on balls against Don Drysdale of the Los Angeles Dodgers in the third inning, he advanced to third base on another walk and a single before scoring on a sacrifice fly by Jim Davenport. The Giants won, 8–0.

O'Connell was a native of Paterson, New Jersey. He initially signed with the Brooklyn Dodgers and played four years in their farm system. He was sold to the Pirates after the 1949 season while still a minor leaguer, and called up in mid-July 1950. He proceeded to hit .292 (1950) and .294 (1953) in consecutive seasons bracketed by United States Army service during the Korean War (1951–52). O'Connell finished third in voting for the 1950 National League Rookie of the Year and 16th in voting for the 1953 NL Most Valuable Player.

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