Bill Oster

William Charles Oster (January 2, 1933 – June 6, 2020) was an American professional baseball pitcher, a left-hander who appeared in eight games in Major League Baseball for the Philadelphia Athletics during the season. Born in New York City, Oster was listed as tall and . He attended New York University.

Oster was signed by the Athletics as an amateur free agent on August 20, 1954, and made his MLB debut three days later. His only decision came a little over a month later in his final MLB game when the Athletics were defeated by the New York Yankees, 10–2. The game, Oster's only big-league starting pitcher assignment, was played at Yankee Stadium in Oster's home city. He allowed one earned run, three hits and five bases on balls in three innings of work before exiting for a pinch hitter, trailing 4–1.