Jackie Robinson plays in first game as a major leaguer with Brooklyn Dodgers

In his first season, with Eddie Stanky entrenched at second base for the Dodgers, Robinson was forced to play first base. On April 15, 1947 Robinson made his debut before a crowd of 26,623 spectators at Ebbets Field, including more than 14,000 black patrons. Although he failed to get a base hit, the Dodgers won 5–3. Robinson became the first player since 1887 to break the baseball color line.

http://en.wikipedia.org/wiki/Jackie_Robinson