Milton Darrell Osteen (February 14, 1943 – October 22, 2017) was an American professional baseball player for the Cincinnati Reds and the Oakland Athletics from 1965 to 1970.

A right-handed pitcher, he was signed as an amateur free agent in 1962 by the Reds, and was traded to the Athletics on November 21, 1967.

He made his major league debut on September 2, 1965 against the Braves in Cincinnati's Crosley Field, relieving Gerry Arrigo and pitching two scoreless innings in a 4–3 Reds loss.

[3] Osteen was traded with Rob Gardner from the Oakland Athletics to the New York Yankees for Curt Blefary on May 25, 1971.

In parts of four Major League seasons, he pitched in 29 games and had a 1–4 record with an 8.05 earned run average.